I've been trying to resolve an upcoming issue for months. Dealership installed new fuel pump. Less than a week later same issue. Took the vehicle back. They wanted $3500 just to find the issue. Took the car home. Then took it to another shop. They held the car a week and came back and said they had no idea. Took the car to a third shop. They replaced the sensor. No go. The are now checking the wiring. They strongly believe its an electrical issue. I will update you when I learn more. Thanks for the content. Your videos are always well made and easy for a novice to understand.
I am very impressed with every aspect of this effort -your delivery, timing, clarity and obvious kindness comes through in every moment. Thank you for your giving spirit, Sir.
Great video... I have a 2013 QX-56 with 195K miles. Mine starting running rough and had a loss of power. Wouldn't get over 2000 RPM. It was showing a low fuel pressure code. When I clicked on the recommended repair, it said to replace the HPFP. To be on the safe side I drove it to Nissan. They stated there was gas in my oil and basically I needed a new or used motor or around 9600.00 in repairs. I did talk to the mechanic and he stated the fuel was getting in the oil from the HPFP. Ever heard of that? I understand they recommend timing chains at 200K miles which was part of the 9600.00. They of course wanted me to trade it in and give me pretty much nothing for it. I call myself a TH-cam mechanic thanks to videos like this. Planning to just trailer it home and either part it our or try to fix it myself. It stinks that HPFP is so expensive, even used from a junkyard. Thoughts? Advice?
@@EdBwoy Would this lifter valve happen to be what infiniti service department is calling a Lobe Cup for high pressure fuel pump? I haven't found anything on a Lobe Cup.
@@ddavis9542 that would be a rather odd name for it, but yes it does sound like functionally it is a cup that sits on the cam lobe. If I may ask, what is the context of this conversation with the service department?
@@EdBwoy VERIFIED CEL CONCERN. SCANNED AND FOUND P0087 AND P0090 ACTIVE DTCS. INSPECTED FUEL LINES AND FOUND NO DAMAGE. TESTED PSI WITH GAUGE ON LOW SIDE PRESSURE, PSI WAS WITHIN SPEC. TESTED VOLTAGE ON HIGH PRESSURE SIDE AND READINGS WERE BELOW SPEC. UNABLE TO TEST PRESSURE AS HIGH PRESSURE SIDE IS TOO HIGH FOR GAUGE READINGS * WOULD LIKE TO START WITH REPLACEMENT OF HIGH PRESSURE FUEL PUMP AND LOBE CUP FOR HIGH PRESSURE FUEL PUMP. MORE DIAGNOSIS MAY BE NECESSARY AFTER INSTALLATION. This is from the Infiniti dealership. They want $3600 for repair.
Thans for the video. I did replacement on my patrol 2012, due to engine check alarm P0090 and P 0087 and less power during acceleration. After replacement the alarm gone and the engine fuel consumption become better. I found damage on the bucket and sticky bucket (hard to remove) causing low pressure on the fuel line. Nice job dudes.
Thanks Edbwoy!. 👍 1.5 hours. Spent a lot of time getting it back in. I believe the B" nut was pushed to far back and I couldn't get the pump seated. Well that and I cross threaded the block. That aluminum is soft. I had to really had to think how to get that clip that holds the foam off. After a while I just yanked on it. Out it came. At 70+K miles the old one looked good. Few scratches and a worn spot on the inside of the cup.
You're a good teacher brother I wish you were actually working on the car that I'm having the problems with I have a 2008 Infiniti QX56 and it seems to be different than every other year but of course you came up in the search so I was watching it cuz sometimes I can glean from similar projects but good job go out and get yourself a 2008 LOL so I can watch you working on it
I did mine today, for a 2011 QX56, should apply to all QX after 11. The bucket looks very nice, no damage at all (now 110k miles, timing chain recall was done in 2016). I guess once metal to metal contact is prevented by oil, then it should not be damaged. If there is sign of damage, then more serious problem could be inside the timing cover, say a clogged oil jet or something. I believe it is easier than the M, no messing around the harness, just unbolt some nuts and bolts. I ended up unbolting the two bolts of the bracket surrounding the HP sensor, another blot securing the HP fuel line right next to the right fuel pump nut (freeing slightly the HPFP line to wiggle the pump out). I also unplugged and removed the camshaft position sensor (I assume) because it is in the way of removing the bracket. Then just unbolt the HPFP fuel line, E8 torx bolts and the nuts holding down the pump, the pump will lift right up. I dump the new bucket into fresh oil and drop it into the hole. The o-ring was also replaced since I have the part. I torqued the HP fuel line to 27 ft lb, just slightly higher than the spec of 25 to be on the safe side. So far, no leaks. One weird thing is: I unplugged the 15A fuse 73, which should be the fuel pump control unit. The first time after unplugging, the car still runs! I was very confused. After about 1min, I shut it off. Then the truck stalled out the 2nd crank, and then acted normally like the fuse is removed. Since this is so important, I went to google it, nothing was found. I double checked with the schematic wiring diagram in FSM, looks correct. The fuse 73 is indeed connecting to the power supply of the fuel pump control module, which controls the fuel pump. I reconnected the fuse, the car started right up. I repeated the fuse removal process, it did the same thing, running without fuel pump fuse for the 1st time. Then I cranked 3-4 times after it stalled out at the 2nd start. Then I remove the fuel line with no problem. Btw, it took me 2 hours due to my poor tool management. I have a problem finding my tool right after use. I will inspect it again after say 30k miles, then I should be able to finish this in 1 hour.
Yes! You got the essence of the job. This task isn't supposed to be a rescue mission, but rather it is a form of preventive checkup. I have seen some people grumbling whenever they find the bucket intact, and I'm thinking, "this is a good problem to have!" I'll still keep doing mine periodically. I am glad you were able to handle it yourself, and I don't think 2 hours is that bad. *If you can, grab a camera next time you're doing the job* 😆😆
Also, on the issue of fuel, it's not something if worry about. There usually is a lot of fuel left in the lines so even after the pump power supply is cut off, the engine could run for a little while (with decreasing pressure that you wouldn't notice). What most people do to hurry the process along is to moderately rev the engine.
@@EdBwoy That is also why I was confused. I did rev the engine. It ran normally for 1 min until I shut it off. All other cars I have were not able to run that long without fuel pump fuse, usually started up and stalled out almost immediately, like what the QX56 did on the 2nd crank (longer/shorter 1st time crank does not seem to matter). Anyway, just curious how that could happen :) Maybe the pump has a 2nd power source? But as long as the fuel pressure was indeed released, I am good. Btw, the P0603 did light up the check engine light in the end! But, no other symptom other than the code. Any thoughts? If there is a short in the ECM, I can imagine it may get worse. I may pull the ECM out to measure between the supply and ground and see how much resistance it has.
I can vouch and confirm changing the valve lifter alone doesn't protect you from future failures, especially if you have an early model year like 2011 and 2012. I had replaced the valve lifter on mine at 70k miles and at 73k miles I got the codes P0090 and P0087. When they opened things to check the high pressure fuel pump, the valve lifter had disintegrated itself and fallen into the engine. So now I'm left with a complete engine overhaul and will probably never know why a brand new valve lifter failed. I think the fuel pump or the pre 2012 timing chains are the culprits. I live in the Middle East and we never had the timing chain recall. I wanted to ask your opinion on my situation brother?
And you kept your oil levels where they should be and changed at the right times? Idk how you only got 3k miles from a new lifter valve :( that sucks, man! I’m at 162,500 and about to replace the lifter/studs/nuts as preventative maintenance. Wonder if I should just replace the hpfp…I’m getting awful MPG, even with intake, headers, full exhaust, and a fuel economy tune.
Does these 5.6 motors have carbon build up issues on intake valves that di engines have im panicking i just bought the 5.6 q70 and am worried now that I hear about carbon issues in di engines. I can't find a shop that can walnut blast it and one shop said they think its dual injectors at 2014 and later that cleans the valves. I can't find anywhere to confirm it tho.
Honest answer, yes, carbon does build up and reduces performance by a small margin. Check out the forum - forums.nicoclub.com/m56-carbon-build-up-t626161.html?sid=1e41f419df170e20cf32c8c5fb06c4fb#p6805581
Car went into limp mode with P0087 and P0090 Code currently at the mechanic waiting on the lifter valve to come In let you know how it works out no misfiring codes tho
What’s up Ed your fuel pressure sensor @11:38 where u loosened the 2 10mm bolts has wiring at the end mine dosent not sure if somethings were changed when they did the face left 2015my but my fuel pressure sensor looks almost as if it’s wireless 🤔 idk I’m checking my bucket now well I’m replacing it either way I bought a new one along with the hex nut like u recommend in case something breaks
Lots of lube then perhaps a pair of outwards grabbing snap ring pliers. I know someone told me the chiseled at it using a flathead screwdriver, basically turning it in the hole.
My Nissan Patrol 2010 lost power on acceleration yesterday, dropped car in Nissan service and got a call this morning that HPFP lifter broken and debris went into the engine so i have to either replace or overhaul engine. my engine has done 165k only. Could you please advise the way out as their quotation is 10K USD in Qatari Riyal that is too high. I live in Qatar. I was driving the car with this condition for about 150km before taking it to service center. i can share the pictures on the broken lifter but know how to do it here.
Imran, you can reach me by email - edbwoy@gmail.com Unfortunately, the amount of work required is pretty extensive. The lifter bucket/valve is damaged, the HPFP might also be damaged, the cam lobe/shaft that turns the bucket is bad too. That is the top level of work, but I have not yet heard of anyone doing the repair successfully. By the time it becomes a problem, the debris could have been circulated in the engine and even if you replace the primary components, the engine might not run the same. It costs so much money to do that repair and for most people it just makes sense to buy a whole used engine.
Does the cup make noise like a squeaking.. Mine is an infinity qx80 125k miles. 5.6. I looked up a few videos and not many out and one guy showed the belts off and it was running making the squeaking sound. Said it was the timing chain with slack in it. Rubbing on the oil injection tube. Mine is at infinity right now big mistake and they keep saying the pump is gonna fail, but the chain is a Lil stretched. So when the cup wears will it make the squeaking noise. And as the engine warms up the nose quiets a little. When u accelerate its there very noticeable. Any help thanks
Hi Ed, I looked at the FSM, they also said the high pressure fuse line is not reusable, and somehow label the nuts as places that require oil lubrication? Sounds strange. How much force do you use to retighten this nut? The FSM says 25 ft-lb but a regular torque wrench will not fit here. Did you put any oil there?
I generally haven't been oiling those threads, I just clean them out and do my best on the way back, starting out with hand tightening. This link here has a contribution by a nicoclub member calling out the torque specs. forums.nicoclub.com/howto-m56-q70-5-6-vk56vd-high-pressure-fuel-pump-lifter-bucket-replacement-t625231.html#p6799558
I save the lubrication for the o-ring and lifter bucket itself, and I've found that with careful handling, everything I touch for the HPFP lifter job is reusable. I probably would do it by the book if I was working in a shop charging an owner book rates for the job
@@EdBwoy Thank you for the info! I found that there are open-ended headers that can be turned by a regular 3/8 torque wrench. I may try to slightly over torque it to, say 28 ft-lb instead of 25 just to be on the safe side, since I plan to reuse the line and it is "HIGH PRESSURE", sounds dangerous if it leaks :) I think to replace the line, the intake manifold will need to be removed.
Good luck with the job, and please share progress if you can. On torque spec, I have fortunately "developed a hand” for most fasteners so I can usually make do with such connections without having to buy too many special tools. Thankfully, the connection is pretty resilient as well, so it can handle a little deviation in spec.
@@syndakitpanda1777 tried it but it didn't work if anything the car is running worse bought a new hpfp and replaced the lifter and sadly it's getting stuck on limp mode I'm already having plans to sell it I loved it for awhile but It's Time to Let It Go😥
@@jorgeavelar6484 those the only codes you have I'm literally doing one right now . Gonna inspect that lifter first for damage .. like right this sec I'll let you know .
@@jorgeavelar6484 yea man this lifter is all jacked up all chewed up . Hopefully I can just replace that and be good the cam seems fine . Where it gkes in the hole. J checked while I spun the crank over by hand . No deep marks or cracks
No, I didn't say that. But I will say any wear item that is either neglected in maintenance or improperly designed/repaired will sooner or later become a bigger problem.
I signed the purchase agreement for a QX65 2011, then saw the discussions on this potential issue :( Do you think the job is similar on a QX56? I haven't got the car yet, once I pick it up I may do it immediately as preventive maintenance. This generation seems to have even more issues, the cats/timing chain/hpfp/torque converter, all seems fragile and extremely expensive to repair. I may get myself into another pit. I did ensure the car was in for a recall repair for the timing chain. Well let's see what will come up next...
@@EdBwoy Not yet addressed, I am still waiting for the parts. Btw, the infiniti parts are on sale right now until July 4th, so I order a lot of parts :) When I look at it, QX seems to be easier. I think I may just need to loose the pressure line, the two nuts, and the HPFP seems to have enough room to lift up. Not sure, I will let you know when I get it done.
@@gregmarch4306 Yes, I did get it done. It is quite easy actually, the QX56 has much more space to work on. It did take sometime to wiggle the bucket out, but it is doable.
@Cheng Huang Thank you for the reply! I'm going to try to tackle mine this weekend. Only 85k miles so I'm hoping I'm good with major repairs for awhile!
I have a question I have a 2012 qx56 I changed the ecm/ I changed the fuel pump and the valve that goes in the hole to make the fule pump work truck run smooth but I'm still getting the code for high pressure plus a noise ???? And advice
So, the code & noise is what made you replace the lifter bucket in the first place? How long ago was that, and what was the condition of the lifter valve when you removed it?
@@EdBwoy well the lifter was blown out at the bottom of it . I replaced it about 3 months ago but it was still acting like crazy....... now its like it grind noise coming from it
@@1976tuki unfortunately, from what I know, since your lifter was already damaged, that means that the cam lobe itself has wear. I would compare it to using new brake pads on worn brake rotors - every new lifter bucket you install will keep getting chewed. For the sake of curiosity, remove the lifter *again* and see how this "new" one is holding up. *** Would you know if your VIN qualified your vehicle for the timing chain recall and whether it was done?
There's no official record of this, but from user interviews (much like this interaction between you and I), it seems that the timing chain recall having been performed, increases the likelihood of lifter bucket failure.
Edbwoy, is this a common part that fails on these? You should make a dedicated video on the common problems on these, I've looked around and jeez, nearly every VK owner is too hot-headed to answer honestly or they just swear on their graves that their 5.6 never had issues.
Hahaha, I have no vested interest, so I just put out non-biased infornation.. I can't say for sure how prevalent this failure is, but a good number of M56s have suffered permanent engine damage due to HPFP-related issues. But a good number of M56s and Q70s have also died due to oil starvation issues. So, my advice is to check the HPFP bucket for signs of excessive wear as an indicator of imminent failure. All the ones I have looked at have turned out to be OK, but I can live with that more comfortably than just hoping and wishing all is well.
@@EdBwoy thanks for the input, I really hope you come out with a detailed video on common issues. So far I’m hearing: - Timing Chain - Catalytic Converters - High pressure fuel pump
Dude I just picked up a m56s coming from a g35 g37 and 350z (VQHR and VQVHR) , these cars are a nightmare to work on. Mine had a bcm issue, the rear window shade issue, passenger airbag light, valve cover gaskets and leaky spark plug gaskets (so probably fouled cats as well), and possibly gunked intake valves, ive yet to check that. I also have the starter issue and my fan relay went out as well at only 68K miles!!!! 🤦🏽♂️🤦🏽♂️ please do your due diligence and make sure the previous owner changed the oil on time, if I hadnt got my hands on this car I dont think it wouldve lasted much longer. I also hear these cars dont have proper fusing so when you change things like interior lights it has a possibility of tripping the BCM. (Rumors yet to be confirmed)
I can vouch and confirm changing the valve lifter alone doesn't protect you from future failures, especially if you have an early model year like 2011 and 2012. I had replaced the valve lifter on mine at 70k miles and at 73k miles I got the codes P0090 and P0087. When they opened things to check the high pressure fuel pump, the valve lifter had disintegrated itself and fallen into the engine. So now I'm left with a complete engine overhaul and will probably never know why a brand new valve lifter failed. I think the fuel pump or the pre 2012 timing chains are the culprits. I live in the Middle East and we never had the timing chain recall.
HI I have a cuestion I'm getting the codes p0090 p0087 should I change the presure pump or yes do what you do I have a infiniti xq56 2011 and thanks for the video
If the pump is damaged, then yes, you might need to change it as well. But first, investigate to see what the cause of the codes are. I hope it's not too tough to do the same process in this video on the QX56
If that's addressed to me, The code that popped up was due to the way I disconnected the fuel pump. They went away by themselves. I really didn't have any issues, I just wanted to do a preemptive strike.
Worked for me. Had a 2011 QX56 240K miles, lifter had a hole through it. unfortunately my camshaft got scratched up a bit from the broken lifter. I did a little sanding with 800 grit and reassembled with new lifter only. So far so good, but dont trust the integrity on the truck now with that camshaft.
@@PROJEKTSHOCKER there was a few pieces of it inside that small chamber where the lifter goes. Basically all in there on top and reachable. I used a magnet to get them all out. So far 500 miles no issues fingers crossed.
@@jphaley668 I am the exact same situation. Trying to find all the metal bits. Pulled the lower pan and found a few metal parts. Not sure how far to go down the rabbit hole before putting it back together.
@@SPORTSARENAMUSIC which code? And Infiniti says this job requires removing the intake manifold etc... I can do it in half an hour, so the most I'd pay someone to do is one hour labor + parts. No more than 200 bucks.
@@EdBwoy P0087 it funny cause i had some really low gas in the car one morning.. So after warming car i tried to speed to the gas station which is two short block's away. Than that when she started jerking like no fuel than the service engine light came on.. Got an oil change a week later.. But light went off.. 12/23/19 light popped up again.. Autozone said code P0087
So I believe I talked to you in the NICO forums last year. Im doing a complete engine rebuild but have no clue where to start. And there isn't much help online either. Maybe you can help or lead me in the right direction.
forums.nicoclub.com/howto-m56-q70-5-6-vk56vd-high-pressure-fuel-pump-lifter-bucket-replacement-t625231.html
EdBwoy the chrome strip for the grille on the hood of the 06 m35 ... where can I get one of those???
I've been trying to resolve an upcoming issue for months. Dealership installed new fuel pump. Less than a week later same issue. Took the vehicle back. They wanted $3500 just to find the issue. Took the car home. Then took it to another shop. They held the car a week and came back and said they had no idea. Took the car to a third shop. They replaced the sensor. No go. The are now checking the wiring. They strongly believe its an electrical issue. I will update you when I learn more. Thanks for the content. Your videos are always well made and easy for a novice to understand.
Any updates?
I am very impressed with every aspect of this effort -your delivery, timing, clarity and obvious kindness comes through in every moment. Thank you for your giving spirit, Sir.
Great video... I have a 2013 QX-56 with 195K miles. Mine starting running rough and had a loss of power. Wouldn't get over 2000 RPM. It was showing a low fuel pressure code. When I clicked on the recommended repair, it said to replace the HPFP. To be on the safe side I drove it to Nissan. They stated there was gas in my oil and basically I needed a new or used motor or around 9600.00 in repairs. I did talk to the mechanic and he stated the fuel was getting in the oil from the HPFP. Ever heard of that? I understand they recommend timing chains at 200K miles which was part of the 9600.00. They of course wanted me to trade it in and give me pretty much nothing for it. I call myself a TH-cam mechanic thanks to videos like this. Planning to just trailer it home and either part it our or try to fix it myself. It stinks that HPFP is so expensive, even used from a junkyard. Thoughts? Advice?
What did you end up doing?
I would also like to hear how this story ended. I'm in the same boat with my QX56 but don't trust the dealer.
Im going to do mine as preventative maintenance mext oil change. I'm at 113k, but love my car, and will do whatever it takes to keep it running well
I'm right there with you. Cheap insurance and it doesn't take that long to do either.
@@EdBwoy Would this lifter valve happen to be what infiniti service department is calling a Lobe Cup for high pressure fuel pump? I haven't found anything on a Lobe Cup.
@@ddavis9542 that would be a rather odd name for it, but yes it does sound like functionally it is a cup that sits on the cam lobe.
If I may ask, what is the context of this conversation with the service department?
@@EdBwoy VERIFIED CEL CONCERN. SCANNED AND FOUND P0087 AND P0090 ACTIVE DTCS. INSPECTED FUEL LINES AND FOUND NO DAMAGE. TESTED PSI WITH GAUGE ON LOW SIDE PRESSURE, PSI WAS WITHIN SPEC. TESTED VOLTAGE ON HIGH PRESSURE SIDE AND READINGS WERE BELOW SPEC. UNABLE TO TEST PRESSURE AS HIGH PRESSURE SIDE IS TOO HIGH FOR GAUGE READINGS
* WOULD LIKE TO START WITH REPLACEMENT OF HIGH PRESSURE FUEL PUMP AND LOBE CUP FOR HIGH PRESSURE FUEL PUMP. MORE DIAGNOSIS MAY BE NECESSARY AFTER INSTALLATION.
This is from the Infiniti dealership. They want $3600 for repair.
@@EdBwoy which they don't guarantee that will even fix it.
Thans for the video. I did replacement on my patrol 2012, due to engine check alarm P0090 and P 0087 and less power during acceleration.
After replacement the alarm gone and the engine fuel consumption become better. I found damage on the bucket and sticky bucket (hard to remove) causing low pressure on the fuel line.
Nice job dudes.
Thanks Edbwoy!. 👍 1.5 hours. Spent a lot of time getting it back in. I believe the B" nut was pushed to far back and I couldn't get the pump seated. Well that and I cross threaded the block. That aluminum is soft. I had to really had to think how to get that clip that holds the foam off. After a while I just yanked on it. Out it came.
At 70+K miles the old one looked good. Few scratches and a worn spot on the inside of the cup.
You're a good teacher brother I wish you were actually working on the car that I'm having the problems with I have a 2008 Infiniti QX56 and it seems to be different than every other year but of course you came up in the search so I was watching it cuz sometimes I can glean from similar projects but good job go out and get yourself a 2008 LOL so I can watch you working on it
I did mine today, for a 2011 QX56, should apply to all QX after 11. The bucket looks very nice, no damage at all (now 110k miles, timing chain recall was done in 2016). I guess once metal to metal contact is prevented by oil, then it should not be damaged. If there is sign of damage, then more serious problem could be inside the timing cover, say a clogged oil jet or something. I believe it is easier than the M, no messing around the harness, just unbolt some nuts and bolts. I ended up unbolting the two bolts of the bracket surrounding the HP sensor, another blot securing the HP fuel line right next to the right fuel pump nut (freeing slightly the HPFP line to wiggle the pump out). I also unplugged and removed the camshaft position sensor (I assume) because it is in the way of removing the bracket. Then just unbolt the HPFP fuel line, E8 torx bolts and the nuts holding down the pump, the pump will lift right up.
I dump the new bucket into fresh oil and drop it into the hole. The o-ring was also replaced since I have the part. I torqued the HP fuel line to 27 ft lb, just slightly higher than the spec of 25 to be on the safe side. So far, no leaks.
One weird thing is: I unplugged the 15A fuse 73, which should be the fuel pump control unit. The first time after unplugging, the car still runs! I was very confused. After about 1min, I shut it off. Then the truck stalled out the 2nd crank, and then acted normally like the fuse is removed. Since this is so important, I went to google it, nothing was found. I double checked with the schematic wiring diagram in FSM, looks correct. The fuse 73 is indeed connecting to the power supply of the fuel pump control module, which controls the fuel pump. I reconnected the fuse, the car started right up. I repeated the fuse removal process, it did the same thing, running without fuel pump fuse for the 1st time. Then I cranked 3-4 times after it stalled out at the 2nd start. Then I remove the fuel line with no problem.
Btw, it took me 2 hours due to my poor tool management. I have a problem finding my tool right after use. I will inspect it again after say 30k miles, then I should be able to finish this in 1 hour.
Yes! You got the essence of the job.
This task isn't supposed to be a rescue mission, but rather it is a form of preventive checkup. I have seen some people grumbling whenever they find the bucket intact, and I'm thinking, "this is a good problem to have!" I'll still keep doing mine periodically.
I am glad you were able to handle it yourself, and I don't think 2 hours is that bad. *If you can, grab a camera next time you're doing the job* 😆😆
Also, on the issue of fuel, it's not something if worry about.
There usually is a lot of fuel left in the lines so even after the pump power supply is cut off, the engine could run for a little while (with decreasing pressure that you wouldn't notice). What most people do to hurry the process along is to moderately rev the engine.
@@EdBwoy That is also why I was confused. I did rev the engine. It ran normally for 1 min until I shut it off. All other cars I have were not able to run that long without fuel pump fuse, usually started up and stalled out almost immediately, like what the QX56 did on the 2nd crank (longer/shorter 1st time crank does not seem to matter). Anyway, just curious how that could happen :) Maybe the pump has a 2nd power source? But as long as the fuel pressure was indeed released, I am good.
Btw, the P0603 did light up the check engine light in the end! But, no other symptom other than the code. Any thoughts? If there is a short in the ECM, I can imagine it may get worse. I may pull the ECM out to measure between the supply and ground and see how much resistance it has.
I can vouch and confirm changing the valve lifter alone doesn't protect you from future failures, especially if you have an early model year like 2011 and 2012.
I had replaced the valve lifter on mine at 70k miles and at 73k miles I got the codes P0090 and P0087. When they opened things to check the high pressure fuel pump, the valve lifter had disintegrated itself and fallen into the engine.
So now I'm left with a complete engine overhaul and will probably never know why a brand new valve lifter failed. I think the fuel pump or the pre 2012 timing chains are the culprits. I live in the Middle East and we never had the timing chain recall.
I wanted to ask your opinion on my situation brother?
And you kept your oil levels where they should be and changed at the right times? Idk how you only got 3k miles from a new lifter valve :( that sucks, man! I’m at 162,500 and about to replace the lifter/studs/nuts as preventative maintenance. Wonder if I should just replace the hpfp…I’m getting awful MPG, even with intake, headers, full exhaust, and a fuel economy tune.
Maybe with a lifter it’s necessary to change gaskets, when gasket skips gas it washes away the oil film from the lifter and damages it
I replaced mine too (Nissan Patrol 2012) after hearing some reports of engine failure. after hard job I found it like new too!!
I was pretty happy, that's peace of mind. I shall be checking it again since I just crossed over 100,000 miles.
Very good video,any symptoms or engine light thanks
Great video .. thank you so much for this video as it helped me fix my 2011 Infiniti QX56 with the same issue
Thanks a lot
You're welcome, and I hope the QX56 stays running reliably going forward
Did your qx56 give this two codes? Mine just had them come up today
@@MichaelRHead-zv2zf
What are the 2 codes ?
Does these 5.6 motors have carbon build up issues on intake valves that di engines have im panicking i just bought the 5.6 q70 and am worried now that I hear about carbon issues in di engines. I can't find a shop that can walnut blast it and one shop said they think its dual injectors at 2014 and later that cleans the valves. I can't find anywhere to confirm it tho.
Honest answer, yes, carbon does build up and reduces performance by a small margin.
Check out the forum - forums.nicoclub.com/m56-carbon-build-up-t626161.html?sid=1e41f419df170e20cf32c8c5fb06c4fb#p6805581
These engines are strictly DI. FWIW, most owners don't even do the carbon cleaning
Car went into limp mode with P0087 and P0090 Code currently at the mechanic waiting on the lifter valve to come In let you know how it works out no misfiring codes tho
I got my parts from a Nissan dealership. They had to order them, but I had them in hand the next day
EdBwoy I overnighted mines
What happened?
Great Job, smart and neat !
Thank you. All the best with your project
What’s up Ed your fuel pressure sensor @11:38 where u loosened the 2 10mm bolts has wiring at the end mine dosent not sure if somethings were changed when they did the face left 2015my but my fuel pressure sensor looks almost as if it’s wireless 🤔 idk I’m checking my bucket now well I’m replacing it either way I bought a new one along with the hex nut like u recommend in case something breaks
Well...no luck with the sensor now they are looking at the ECU. wish me luck.
Thank u Ed boy am free happy you are king infiniti Thaks a lot form saudia Arabia ❤
Thank you very much. Always glad to help
What if the lifter bucket is stuck? Is there a tool to get it out or how do I go about that?
Lots of lube then perhaps a pair of outwards grabbing snap ring pliers.
I know someone told me the chiseled at it using a flathead screwdriver, basically turning it in the hole.
Have you ever thought about doing a body conversion from the m56 to q70?
I might do it down the line, maybe to the project car when I get it running
Q70 has a v8 engine but horsepower is less from what i remember b4 i bought the M56x 2013.. And you get a better camera system..
@@SPORTSARENAMUSIC you're probably thinking of the long wheelbase V8.
Did you have to disconnect the fuel pump under the back seat to do the hpfp? Thanks
what code does the car have before replacing that part?
HEY BRO, IN MD, LOVE YOUR VIDS. IS THIS AN ABSOLUTELY NEEDED SERVICE? LOVE MY CAR AND DON'T WANT SOME STUPID SUPRISES!
My Nissan Patrol 2010 lost power on acceleration yesterday, dropped car in Nissan service and got a call this morning that HPFP lifter broken and debris went into the engine so i have to either replace or overhaul engine. my engine has done 165k only. Could you please advise the way out as their quotation is 10K USD in Qatari Riyal that is too high. I live in Qatar. I was driving the car with this condition for about 150km before taking it to service center. i can share the pictures on the broken lifter but know how to do it here.
Imran, you can reach me by email - edbwoy@gmail.com
Unfortunately, the amount of work required is pretty extensive. The lifter bucket/valve is damaged, the HPFP might also be damaged, the cam lobe/shaft that turns the bucket is bad too. That is the top level of work, but I have not yet heard of anyone doing the repair successfully. By the time it becomes a problem, the debris could have been circulated in the engine and even if you replace the primary components, the engine might not run the same. It costs so much money to do that repair and for most people it just makes sense to buy a whole used engine.
Say, did you have to take the vehicle to a service shop to do the timing chain recall?
Hello Imran, what did you end up doing with the repair for the car?
Does the cup make noise like a squeaking.. Mine is an infinity qx80 125k miles. 5.6. I looked up a few videos and not many out and one guy showed the belts off and it was running making the squeaking sound. Said it was the timing chain with slack in it. Rubbing on the oil injection tube. Mine is at infinity right now big mistake and they keep saying the pump is gonna fail, but the chain is a Lil stretched. So when the cup wears will it make the squeaking noise. And as the engine warms up the nose quiets a little. When u accelerate its there very noticeable. Any help thanks
Awesome job, thanks
Thank you Amr
Hi Ed, I looked at the FSM, they also said the high pressure fuse line is not reusable, and somehow label the nuts as places that require oil lubrication? Sounds strange. How much force do you use to retighten this nut? The FSM says 25 ft-lb but a regular torque wrench will not fit here. Did you put any oil there?
I generally haven't been oiling those threads, I just clean them out and do my best on the way back, starting out with hand tightening.
This link here has a contribution by a nicoclub member calling out the torque specs. forums.nicoclub.com/howto-m56-q70-5-6-vk56vd-high-pressure-fuel-pump-lifter-bucket-replacement-t625231.html#p6799558
I save the lubrication for the o-ring and lifter bucket itself, and I've found that with careful handling, everything I touch for the HPFP lifter job is reusable. I probably would do it by the book if I was working in a shop charging an owner book rates for the job
@@EdBwoy Thank you for the info! I found that there are open-ended headers that can be turned by a regular 3/8 torque wrench. I may try to slightly over torque it to, say 28 ft-lb instead of 25 just to be on the safe side, since I plan to reuse the line and it is "HIGH PRESSURE", sounds dangerous if it leaks :) I think to replace the line, the intake manifold will need to be removed.
Good luck with the job, and please share progress if you can.
On torque spec, I have fortunately "developed a hand” for most fasteners so I can usually make do with such connections without having to buy too many special tools. Thankfully, the connection is pretty resilient as well, so it can handle a little deviation in spec.
Would this also be the cause for a P0088 and P0090😮
Yes .
@@syndakitpanda1777 tried it but it didn't work if anything the car is running worse bought a new hpfp and replaced the lifter and sadly it's getting stuck on limp mode I'm already having plans to sell it I loved it for awhile but It's Time to Let It Go😥
@@jorgeavelar6484 those the only codes you have I'm literally doing one right now . Gonna inspect that lifter first for damage .. like right this sec I'll let you know .
@@syndakitpanda1777 yep the only two codes that I have
@@jorgeavelar6484 yea man this lifter is all jacked up all chewed up . Hopefully I can just replace that and be good the cam seems fine . Where it gkes in the hole. J checked while I spun the crank over by hand . No deep marks or cracks
Are you located in Georgia
So question, this is just one means of insurance against failure right? Because the cam lobe thing can still wear out right?
Exactly! You got it.
It is a way of preventive maintenance, just like checking your tire pressure.
@@EdBwoy So these engines are ticking time bombs? I mean you can't exactly replace the Cam lobe very easily
No, I didn't say that. But I will say any wear item that is either neglected in maintenance or improperly designed/repaired will sooner or later become a bigger problem.
I signed the purchase agreement for a QX65 2011, then saw the discussions on this potential issue :( Do you think the job is similar on a QX56? I haven't got the car yet, once I pick it up I may do it immediately as preventive maintenance. This generation seems to have even more issues, the cats/timing chain/hpfp/torque converter, all seems fragile and extremely expensive to repair. I may get myself into another pit. I did ensure the car was in for a recall repair for the timing chain. Well let's see what will come up next...
Sorry for the late reply, but I recall you already addressed it.
How similar or different was it in the QX?
@@EdBwoy Not yet addressed, I am still waiting for the parts. Btw, the infiniti parts are on sale right now until July 4th, so I order a lot of parts :) When I look at it, QX seems to be easier. I think I may just need to loose the pressure line, the two nuts, and the HPFP seems to have enough room to lift up. Not sure, I will let you know when I get it done.
@@doowtsewable1 Did you get it replaced on your QX56? I'm needing to do mine soon.
@@gregmarch4306 Yes, I did get it done. It is quite easy actually, the QX56 has much more space to work on. It did take sometime to wiggle the bucket out, but it is doable.
@Cheng Huang Thank you for the reply! I'm going to try to tackle mine this weekend. Only 85k miles so I'm hoping I'm good with major repairs for awhile!
I have a question I have a 2012 qx56 I changed the ecm/ I changed the fuel pump and the valve that goes in the hole to make the fule pump work truck run smooth but I'm still getting the code for high pressure plus a noise ???? And advice
So, the code & noise is what made you replace the lifter bucket in the first place? How long ago was that, and what was the condition of the lifter valve when you removed it?
@@EdBwoy well the lifter was blown out at the bottom of it . I replaced it about 3 months ago but it was still acting like crazy....... now its like it grind noise coming from it
@@1976tuki unfortunately, from what I know, since your lifter was already damaged, that means that the cam lobe itself has wear.
I would compare it to using new brake pads on worn brake rotors - every new lifter bucket you install will keep getting chewed.
For the sake of curiosity, remove the lifter *again* and see how this "new" one is holding up.
***
Would you know if your VIN qualified your vehicle for the timing chain recall and whether it was done?
@@EdBwoy timing chain was recalled and work was done by dealer
There's no official record of this, but from user interviews (much like this interaction between you and I), it seems that the timing chain recall having been performed, increases the likelihood of lifter bucket failure.
Edbwoy, is this a common part that fails on these? You should make a dedicated video on the common problems on these, I've looked around and jeez, nearly every VK owner is too hot-headed to answer honestly or they just swear on their graves that their 5.6 never had issues.
Hahaha, I have no vested interest, so I just put out non-biased infornation..
I can't say for sure how prevalent this failure is, but a good number of M56s have suffered permanent engine damage due to HPFP-related issues.
But a good number of M56s and Q70s have also died due to oil starvation issues. So, my advice is to check the HPFP bucket for signs of excessive wear as an indicator of imminent failure.
All the ones I have looked at have turned out to be OK, but I can live with that more comfortably than just hoping and wishing all is well.
@@EdBwoy thanks for the input, I really hope you come out with a detailed video on common issues. So far I’m hearing:
- Timing Chain
- Catalytic Converters
- High pressure fuel pump
If I can get the time, I would love to.
Dude I just picked up a m56s coming from a g35 g37 and 350z (VQHR and VQVHR) , these cars are a nightmare to work on. Mine had a bcm issue, the rear window shade issue, passenger airbag light, valve cover gaskets and leaky spark plug gaskets (so probably fouled cats as well), and possibly gunked intake valves, ive yet to check that. I also have the starter issue and my fan relay went out as well at only 68K miles!!!! 🤦🏽♂️🤦🏽♂️ please do your due diligence and make sure the previous owner changed the oil on time, if I hadnt got my hands on this car I dont think it wouldve lasted much longer. I also hear these cars dont have proper fusing so when you change things like interior lights it has a possibility of tripping the BCM. (Rumors yet to be confirmed)
I can vouch and confirm changing the valve lifter alone doesn't protect you from future failures, especially if you have an early model year like 2011 and 2012.
I had replaced the valve lifter on mine at 70k miles and at 73k miles I got the codes P0090 and P0087. When they opened things to check the high pressure fuel pump, the valve lifter had disintegrated itself and fallen into the engine.
So now I'm left with a complete engine overhaul and will probably never know why a brand new valve lifter failed. I think the fuel pump or the pre 2012 timing chains are the culprits. I live in the Middle East and we never had the timing chain recall.
Poo8a?
HI I have a cuestion I'm getting the codes p0090 p0087 should I change the presure pump or yes do what you do I have a infiniti xq56 2011 and thanks for the video
If the pump is damaged, then yes, you might need to change it as well.
But first, investigate to see what the cause of the codes are. I hope it's not too tough to do the same process in this video on the QX56
I have the same problem on my 2011 QX56 did this fix the problem and did the code come back after you cleared it?
If that's addressed to me, The code that popped up was due to the way I disconnected the fuel pump. They went away by themselves.
I really didn't have any issues, I just wanted to do a preemptive strike.
Worked for me. Had a 2011 QX56 240K miles, lifter had a hole through it. unfortunately my camshaft got scratched up a bit from the broken lifter. I did a little sanding with 800 grit and reassembled with new lifter only. So far so good, but dont trust the integrity on the truck now with that camshaft.
@@jphaley668 did you find the missing piece of that lifter? if so, where did you find it at?
@@PROJEKTSHOCKER there was a few pieces of it inside that small chamber where the lifter goes. Basically all in there on top and reachable. I used a magnet to get them all out. So far 500 miles no issues fingers crossed.
@@jphaley668 I am the exact same situation. Trying to find all the metal bits. Pulled the lower pan and found a few metal parts. Not sure how far to go down the rabbit hole before putting it back together.
Hey, should I get a m45 or m45 sport. I like the rear steering??
If you want the rear steering, sport is the only way to get it.
@@EdBwoy is it great on the corners?? Easy to replace?
@@charlesphillips7638 it is *amazing* at handling corners. I haven't had to replace anything in the system
What year is this QX56 my car is having the same problem it’s an 2011
Mine is a 2011 M56 sedan.
Hi this code came up on my 2013 m56x roughly how much should i be paying for this job done around what 450 or 500 dollars
I only have 81k miles on car also
@@SPORTSARENAMUSIC which code? And Infiniti says this job requires removing the intake manifold etc... I can do it in half an hour, so the most I'd pay someone to do is one hour labor + parts. No more than 200 bucks.
@@SPORTSARENAMUSIC do you know if the timing chain recall was done on your vehicle?
@@EdBwoy did not know they had that on the 2013..
@@EdBwoy P0087 it funny cause i had some really low gas in the car one morning.. So after warming car i tried to speed to the gas station which is two short block's away. Than that when she started jerking like no fuel than the service engine light came on.. Got an oil change a week later.. But light went off.. 12/23/19 light popped up again.. Autozone said code P0087
Has that car been in the ocean?
So I believe I talked to you in the NICO forums last year. Im doing a complete engine rebuild but have no clue where to start. And there isn't much help online either. Maybe you can help or lead me in the right direction.
This not the problem
Could you share a little more information? What is the problem?
This car is a piece of shit with lifter problems . Needs cam changing when the lifter breaks or goes bad