How to Replace Fuel Injectors on a 99-08 Dodge Jeep 4.7 & 3.7
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- เผยแพร่เมื่อ 21 ส.ค. 2024
- This is a fuel injector upgrade by installing Denso 12582704 injectors. How to get more HP and better MPG. The Denso injectors are a 12 hole design. At the end of the video, I also explain how to reset the ECM or PCM to put it into a fast learning mode.
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the Bob Ross of builds
Happy little injectors. 👍💨👌
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I have a 2000 Dodge Dakota Sport 4x4 with a 4.7 liter engine. Replaced all 8 injectors. This video was a great help, could not have done it without watching it. Keep these helpful videos coming. Thanks !!!!!!
Just got done doing this on my 04 Dakota! Bro you're the king of these type videos! Every step was clean and clear and easy to follow and made sense! Thanks for saving me a lot of time, money and stress!!
You're welcome and thank you!
I’m probably doing the same thing today or tomorrow. Hope I’m as successful as you!
This guy is awesome. He doesn't forget what's it's like to be new and is patient. Without you I would have been in the dark, thank you !!!
Thanks for the video! Helps us keep our 4.7s alive. Mine just rolled over 401k miles without a rebuild.
I couldn't find the Denso units you used, so I used AC Delco 217-2907 for a 2007 2.4L HHR. The resistance is about +1ohm (13.2 or so ohms vs 12.3 or so) vs my 2003 stock non-HO units. They're 12 holes just like your Densos, but I didn't have to mod the fuel rail because they didn't touch the valve covers.
For anyone reading this, in my experience the mpg display is super optimistic now (600 miles of mixed driving) and shows 19-22 average. Realistic fuel economy is unchanged at about 17.8 combined. There is a cold idle + AC on idle issue where it gets confused and pulses the IAC erratically, then clears up. Happened after PCM reset mainly and now clearing up. There's definitely a low rpm torque bump, and a much smoother power delivery throughout the range. Full throttle I dont notice any bonus, but part throttle and especially super light throttle, totally worth the benefit. On my Dakota the replacement was more involved because had to remove alternator and move AC compressor, and bungee wires and heater hoses out of the way. Took about 3 hours going easy and cleaning up and painting the fuel rail.
Another way to reset the PCM is to disconnect both positive and negative terminals from the battery and touch them together for a couple of minutes. Basically the same as touching the positive to the chassis. We used to do that at at Dodge to clear the "Gas Cap" evap code.
I installed a rebuilt engine a month ago and my mpg dropped from 17.4 average to 12. No changes only the engine. Today I completed this mod and BAMMMM 19.3 off the bat. You are the man!
Thank you , I'm glad it worked out for you.
Do you realize that the mileage would get better as the motor is broke in and rings are sealed
@@martinbuilt where can you buy injector rebuild kits and is there a special tool needed to hold the high pressure spring down
@@BigWood3131 hard time finding rebuild kit for those injectors. My old Rings were in very good condition so I reuse those & the pintle cap. The filter baskets you can use the same ones from a Bosch type injector that was the only thing I actually changed out. O-rings for the Bosch injector will also work. There are no high pressure Springs or anything that's going to come flying apart.
Really curious who you purchased your rebuilt engine from. Need to be prepared for the worst.
just performed this injector swap on my 2001 durango and im astonished at just how much power this actually added. great video Martin, it was alot of help!
I'm very glad to hear that. I just love it when a plan comes together.
I’m about to do this on my 00 Durango. Did you see a better increase in mpg?
didnt have any positive or negative effect on mpg, just woke it up a bit.
Damn it made that big of difference? I wana try it on my 2002 Dakota w the 4.7 now, cause I’ve been wanting to squeeze some more power out of her and was looking at throttle bottle spacers and cold air intakes and shit like that
@@DownHillgamer id say out of all the mods i did to my 4.7, the ones that made the biggest difference in noticeable power were the HO cams and the injector swap. throttle body spacers and CAI are not going to do anything other than drain your bank account, unfortunately. same goes for a tuner. i noticed little difference over stock with a diablosport. the 2008+ intake manifold swap is also a good modification but theyre getting harder and harder to find and require an adapter for the stock throttle body.
I just did this upgrade. I haven't driven it enough yet to get a good average mpg, but my instant mpg went from 21-22 @ 50 mph to 32-36 @ 50 mph. Thank you Martin, you videos are in formative and knowledgeable. I've learned so much from your videos and I plan on doing quite a few more of you mods.
That is awesome, great results, thanks for sharing 👍
Lol false
I just did this to my 02 Dakota. Worked very well. Importantly I did not come across any issues that you had not already addressed and am grateful to you for such a well explained process.
Thank you Jeff, I'm glad hear it worked out for you.
just got the call from the shop that i had to hire to switch from my old V8 to put in the newer v8 with the 4.7 HO cam, springs and intake manifold plus the denzo injecters. finally done ill pick it up tomorrow morning. one year without 4 wheel transport can't wait until i run it on my way home, then i will do the reset to learn mode. all is good with the switch on the motor with all the work i did to it. thank you for the videos that gave me many ideas and run through on how to do's this and that. your videos are the best and i thank you for all your doing. yeah on the road again...first 750 mile ill take it easy.
Just changed my injectors after watching your videos. It went prefect! Thank you so much
I had replaced the injectors on my 2002 Durango a few years ago and now need to do the same on my 2000 Durango since receiving the P0207 code. Injector cleaner only helped for a few weeks then the code returned. Your video is a great reminder how to replace the injectors correctly. Thank you for such detail as your reminder helped.
After further investigating, a bad connector was found at injector #3 causing the P0303 code. Now the code is satisfied but the idle remains rough and engine requires several rotations before starting when at full operating temp, does not happen with engine cold. This began after a mechanic worked on it and will take it back to discover problem and fix. 270K miles I guess it might be time for a new one. Thx for your feedback.
Great video!!!! Important information was easy to understand and apply. I'm getting ready to replace my injectors for my 2000 Durango. I can't wait to put on the Desnco 12582704 injectors. There are not too many things that can be done to improve the performance of the 4.7 as far as I know, other than the K & N air filter and the E3.48 spark plugs.
Looking forward to learning more you! Great job!
Thank you, these injectors work really well once you add a few mods. I've got some other videos that you'll find have greatly improved horsepower and torque. Thank you for subscribing!
Really enjoy your videos Martin...hands-down some of the best how-to vids on TH-cam! I'll be doing this upgrade soon in my daughter's 2002 WJ. Already been to the salvage yard and picked up 12 (few extra just in case) of the Denso injectors out of some Malibus...side note..all of the Cobalts with the 2.2 Ecotec I checked out had a 4-hole injector. I also clipped off a wiring harness that I will modify to make testing and cleaning the injectors a little easier. The rebuild kits are on the way and I will hopefully get this done in the next week or two. My daughter is looking forward to some increases in MPG (currently around 15 mixed driving). Thanks again.
Great video. Actually shows all complete steps. Probably best one showing how to swap the injectors on 4.7 Magnum.
Great video. Explains it very well. I have a question. will the Denzo fuel injectors work on my 2009 Dodge ram 3.7 l
Great video, Martin. I have 2000 WJ, but with HO engine installed. We run it on lpg in Poland, because 1 liter of gas costs 1.5 bucks here😉. Cheers from Poland!
great video and well described procedure, tried this mod for myself and did not work as intended.i have a 2005 dakota with a 4.7 and running the ngc pcm. stock fuel pressure is 58psi for my truck.using the denso part number and a donor fuel rail modified to allow rotation of injectors i set on my way with the install.i started with -8% on right bank and -2% on the left bank for long term fuel trims.once the injectors were swapped i performed a memory reset for adaptive to start a new learning process for the newly installed injectors.within 5 minutes checked fuel trims and found -26% and -19%,major difference in fuel flow and thought might be cause i was in idle cell and consuming fuel at idle.drove the truck for 2 days and rechecked the fuel trims and no change. pcm was trying to pull a very large amount of fuel away from these new injector.had p0300 show up randomly but not counting misfires when i was able to check.truck was running ok, no noticeable change in fuel economy or response.refilled fuel tank and set out again thought maybe it would get better.after about a half a tank of fuel truck set right bank to rich dtc.desided to switch back to stock injectors as my truck couldn't adjust to this injector.martin talks about cc rating at 3 bar(43psi) not sure of what kind of jump these injectors make in flow rate at 58psi as the 90$ i spent on used stuff was enough of a loss for me and i wasn't about to send the injectors out for flow testing.just figured i would share my experience. not sure if martin is running a jtec pcm as it runs at 49psi fuel pressure and this is why his outcome was better as the fuel rating would be a lot closer. just wanted to share my experience.great video tho, i have watched many other videos and will continue to watch.
Same was true with me. If you have 04 or newer with 4 plug pcm your fuel pressure is to high (58psi)to use these. Runs ok but rich. Excellent video by Martin. He is the 4.7 magnum magician.
Martin's WJ is an '04 I thought. Does he say which computer he is running?
@@richwilson7017 I have a ram 05. Installed the 12point and my long trims stay at -20 during idle and my short trims around -2.
They go to 0 during acceleration, both long and short trims.
My onboard mpg shows around 14.5 mpg compared with 11 mpg as it was before the injector replacement.
I dont think I really save that much on mpg in real life, though.
Maybe the computer reads the inflow fuel and not the residual outflow from the rails.
The truck drives nice with good idle rpm.
Just hit 370K on my '01 which I believe has the red ring injectors...still runs great on the OEM injectors and coil packs. I do think the Superchips 3715 tune has really helped out over the years. I run the max 87 program. Engine starts first turn of the key. If I ever need to replace an injector I'll follow your excellent guide.
I just replaced with these injectors on my 99 WJ 4.7L along with manifold o2 and cats. Running like a champ now ! Love your videos !
That's awesome, glad to hear that it worked out for you.
I'm really enjoying your channel. My son and I are doing the top end of a 2004 4.7 Jeep Grand Cherokee. This is incredibly helpful and allow us to get it done.
Thank you Scott, I really appreciate that. I'm glad you liked it and found it helpful 👍
Thank you for posting this. I wish I stumbled upon it sooner. I'm in quite the conundrum. I have a 2000 Dodge Durango 4.7. Injector no 1 had an open circuit when when hot. Found that the coil would open up if when the engine was up at full operating temperature. I replaced the no 1 injector (due to budgetary restrictions i was not available to buy a full 8 pack). It vehicle worked great for a week and then the no 5 injector developed the same problem (verified that with a meter). I did quick job for a friend and as payment he got me a set of injectors and injector pigtails off Amazon (I know not the best by a long shot, but I did a small favor for him and couldn't justify asking for much in return). I replaced all 8 injectors and the vehicle ran rough and acted like it was overfueling. I work as a diesel mechanic (19 years experience with Cummins, Detroit, MB, Paccar & CAT diesel engines). My three coworker friends in the shop highly recommended that i replace my oxygen sensors (they've never been replaced in my 16 years of owning that vehicle). I plan on replacing the two (yes i counted) oxygen sensors with OEM Bosch before I rip the cheap Amazon injectors out. On the procedure for relearning the PCM you had mentioned it may need 50 cold starts. Does that mean one a day for 50 days or a couple in a day's period? I am aware that i will have to change the oil a couple of times to be on the safe side. Thank you in advance.
Yeah I could see where using advice would work.
Thank you for watching
@@martinbuilt thank you for responding. now what about the 50 cold starts?
Changed the injectors in my '03 jeep liberty with the Densos you recommended. Went from 18mpg on the hwy to 22+ When I bought it, the avg mpg was 14. Lot's of work but it's running great. Thanks for the videos!!!!
That's awesome! 👍👍🤗
@@martinbuilt hello its work for my laredo 4.7 2002?
I also have a liberty and interested in doing this . Did you run into any issues specific to your liberty ? After the install ?
@@Nonamestranger126 2Yrs W/No problems. But I've been running E85 about 50% of the time, so I no longer see a fuel economy benefit.
I'm glad I watched this first before just "digging in" on my 08 Grand Cherokee (220K miles). Only got 1 injector, but might as well do them all seeing what it takes. But these directions are absolutely very clear. Thank you!
Thank you for watching, if you have the dual spark plugs per cylinder you will need to use the OEM injectors as they are shorter than the earlier models.
I am originally from Iowa
@@martinbuilt well, hello fellow native Iowan 😊
It's a 3.7, so just a single spark plug. I've replaced the injector coils more than once (got a bad batch when initially replaced them), so I certainly know my way getting down that far.
@@iowafarmboy Good luck with that and have a great New Year.
Your videos are always super helpful. I watched your timing chain video too and without that video I probably wouldn’t have been able to do it. Now my Dakota is missing on 2&4. I was told it’s lifters (without proper diagnosis) I’m just goin to do lifters and injectors to be safe. Thanks man
Very good !
MartinBuilt I've been following you on this channel for a long time. You are my Master.
I bought these injectors a couple of years ago. And only now I managed to install these injectors myself.
They really made a big difference. And consumption seems to have been optimized.
I have moments that make me want to meet you in person. Thank you for giving us light of knowledge and helping to improve our machines.
What would I do without you, Martin???!!! You make my life so much easier. And my independence is soaring! Much love to ya man. Thank you!
Glad to hear it, you are very welcome!
@@martinbuilt I’ve heard you say you live in the desert??? Where? I am in Arizona. I need your help. I can not figure out what is wrong with my Jeep. I am losing my mind.
@@adelemartinez8235 Las Vegas
@@martinbuilt oh wow. You’re 50 mins away.
Could you email me? adelewoods46@gmail.com
good sir can i just say that you are just great man , ive had a fair amount of issues resolved easily because of your videos and I must thank you for that , keep it up man
Great to hear, and you are most welcome!
This video was really helpful in getting my 2006 dodge Dakota back running the way it suppose to run Thanks for a well put together video
Awesome video man. You’re great at keeping it simple and explaining yourself! Very professional
I appreciate that, I'm glad you liked it!
Ok I’m going to do the fast track learn mode in the late morning to hopefully get a better idel and running smother. New-rebuild engine, HO cams, HO intake, HO spring change over on stock heads, Denzo 12 Hole injectors, cleaned them out.
PLEASE BE ADVISED, if you can't find this part number, an alternate injector is the 12 hole EV6. Even better, they are directly PnP, no need to modify the fuel rail. Provides the same amount of clearance as the stock injectors.
What did they come in?
@Mitch West - Do you have a a P/N for the 12 Hole EV6 fuel injectors or the year/engine of the EV6?
Me too if i want new rather than used what vehicle n yr do i ask for that part?snooky pa.😊😊
Denso update!
LOT'S of new power here Martin!
Thank's men!
That's awesome, glad to hear it.
@@martinbuilt would love to hear how these new injectors affected 1) performance and 2) fuel economy. Can you give us an update?
Dodge ram 1500 4.7 injector is super easy to change. I changed one on the fly while on a road trip from FL to NYC, in the advance Auto parking lot. The engine light came on and it was sucking up gas like crazy . Took me about 15 mins for one.
I’m likely going to have to replace the cylinder 2 injector if my coil plugs aren’t bad and I just want to say thank you. This video is so detailed, gives great instruction, and shows every step of the way. Definitely makes me more comfortable to do it by myself because I don’t have the money to get it serviced.
Thank you, I really appreciate it 🙏. You are going to save a lot of money by doing it yourself.
@@martinbuilt This is the only reason I'm even going to attempt it haha! I'm really hoping it's the coil plugs gone bad, but if not, is there a way I can find a list of all the tools you used in this video? I'm not sure if we're going to have all of them, so I may need to purchase or rent a few kits.
@@MakaylaChildressdid you end up changing your #2 injector or was it a different problem? Curious because I've got the same code but I've also had a few electrical issues on top of it. I was searching upgraded injectors and ran across this and your comment was second in line. Figured it was fate saying reach out to this person lol.
@@Bluice002 It's been a minute since I changed them, but I think I remember changing about two coil plugs, one cracked in the process and then I changed the fuel injectors.
@@MakaylaChildress Thanks for getting back to me on it, always helps to find others that have had similar issues.
Changed injectors on my 04 Jeep Grand Cherokee 4.7 last night. Thank you for the detailed instructions. Smooth process.
hello is your jeep the 4.7 HO engine ? if so how are the injectors working for you. I want to installed them on my jeep as well. thank you
Your video is the best and most thorough I can find, thank you for taking the time to make a good video.
You're very welcome!
Completed this upgrade on my 2006 Mitsubishi Raider and it runs like a new truck now, great and informative video Martin.
That's awesome Bill, glad to hear it worked out for you.
Loved the video. Makes me more comfortable to swap my injectors by myself. Earned a subscriber. Thank you
Same here.... I'm throwing 3 codes in my 00 4.7L Dodge Dakota, all of which are injectors and misfire... Have to do this in the coming days... Paranoid, but more comfortable than before watching...
Db
Great video! I've already replaced the injectors on my old '02 Liberty Sport five or so years ago, so I've already got the process down. Back then I had used the Neon injectors for the upgrade, and I did notice an increase in power, but still rather poor fuel mileage of @15-16 in town and up to 23 on the highway.
Just last month I had picked up an '02 Liberty Renegade for only $1000.00 with a blown transmission. What I had watched the video for was to find out what injectors that you had used to achieve those MPG and performance gains.
Just finished my 2004 Durango ‘ the low priced injectors from amazon where a bit shorter than the original but they are working great. Thanks for the good video
Thanks for the video been thinking about doing this on my Commander. Precise and to the point.
Just finished this job, NOT AS EASY for me as for Martin. My injector connectors didn't cooperate in being removed. I broke a bunch of the tabs that hold it to the injector. Then the injectors themselves didn't want to come out of the holes. I finally pryed off the rail, and 3 injectors came off and stayed in head, fuel spilled everywhere. The fuel line came off super easy with the special tool he used. Put everything back together with no drama, but not all connectors on injectors made clicking sounds. Fired it up after 1st start up procedure, it took a little effort. Did a test drive, seemed better and smoother, even idles steadily at around 600 rpm. The tranny shifts seemed very hesitant, and during idle it seems like there is more sideways movement, idk why like a split second pause. Anyway, hoping for more mileage, dont notice any more power, but it is smoother. Let's see after the 50 cold starts, only have 3 down. Haha. Thanks Martin.
Had the same issue those little red locking tabs get crumbly with heat cycles.so its easy to just snip out old clips and order from rock auto for 4.7l new leads.dont remember cost but wasnt to bad.wire colors are differant but i assumed dark one was ground or return signal,they seem like all work and lock in place,hope that helps,martin is wj-king.snooky pa😊😊😊
My Dakota had a misfire and your vid helped me clear it right out thank you so much
That's good to hear. I'm glad you found the content helpful. thank you for watching.
Best how to do video, great everything , he gets down to every detail. Made it very simple hope this works for my wj thanks!
Hey martin, i have an 07 jeep commander 3.7 and it pulsates under consistent throttle at highway speeds and after it gets hot and i shut it off and start it up again it runs rough then agter it sits again for a while i start it and it runs fine. Theres a code for a cylinder 3 misfire. Not sure if its the filter in the tank thats part of the fuel pump, a bad injector, or bad plug. Coils are all new.
6:01
"WOO HAHA . . . . . . TEXT MESSAGE"
LOLOLOL
You always do a good job on you're jeeps!
Double Down
Thank you!
@martinbuilt everything you say in all of you're videos work 100% at first I went out to the junkyard at first I wasn't having any luck find finding the EcoBoost injectors and I came across two HHR's with the injectors I needed got home installed them . And the response time improved and my MPG went from 14.0 to 19.0 on the freeway thank you so much please continue to make videos!
Thank you Ronald, yeah I found some of those injectors in the HHR's as well. Glad to hear it worked out for you.
This is the ABSOLUTE best video I've found, I'm now a subscriber. I am certainly no mechanic and I'm a tad apprehensive, but after watching this I'm going to try this coming weekend. With the holiday the estimate of 3 hrs you propose which I'm giving 8 for me, gives me 3 days for the unforeseen 😄 Going with Siemans stock 4 hole, does the 04 GC wj come stock with 1 or 4 hole? I can't get definitive answer anywhere. Only getting 13.5 mpg with 70% highway miles, no check engine light, no rough idle. Just hard start and crappy mpg so figure what the heck, may as well try. Thanks again for giving us great instructional videos.
Greg
Awesome instruction video and great reminder of how to reset the ECM
Thank you I'm glad you liked it and found it helpful.
Very clear and concise presentation. A very helpful video for me and greatly appreciated. From Tampa. Thanks Martin.
You're very welcome I'm glad you like it and found it helpful.
Nice video Martin.your videos are helpful in my WJ upgrades.
Thank you..I'll keep them coming.
Thanks Martin, great tip change injector to economy fuel, gratitude for sharing!👏👏👏
You are very welcome. I'm glad you liked it and found it helpful.😊
The denso injectors works great on my 2000 4.7 gc, it feels with more power
Just started it up. I do notice a difference. I reset the module to recalibrate the air fuel mixture and I can definitely tell it's trying to get sime new data. She's running pretty rich
after the initial start up it will run rich until it can learn the new injectors
@@martinbuilt thank you for suggesting these injectors.
I did not know this one!! THANK YOU!!!! read some reviews for a set and a lot of people have stated better performance and fuel Economy across the board!! would love 22miles per gallon with extra pip yes please!!!! lol Again Thank you for these Videos!!
Glad I could help! 😉
Any suggestions what to do next? Thanks!
I have a 2007 Liberty 3.7L V6, 117,000 miles. Owned it since 67,000 miles. It operated perfectly for the first 30,000 miles and then it started getting a #1 Cyl misfire code P0301. It also seldomly gets a #1 cyl fuel injector circuit open P0201. It must be a very mild fault as the misfire freeze frame data shows it always happens at less than 350 rpm and when cleared it comes back immediately at next startup, cold or hot. So it seems to only happen once on startup as its moving up to regular idle speed. The miss isnt noticeable when driving or idling. Its getting 15.5 mpg fuel mileage. Doesnt burn oil. Doesnt smoke. Has great power. I've changed plugs and coils but no difference. Cleaned air intake, air filter, and ran cleaner through system. I've cleaned and inspected the injector plug and all wires but no difference. Dry / wet compression test of #1, 3 and 5 cylinders all read good: 160 / 175 psi.
I'm wondering if there's a mild wire defect for that injector, or just a flakey connection somewhere. Has anyone tried to use a new set of compatible gauge wires and run them to a place closer to the injector control? I can't see where the wires go though.
I'm not sure if I should just live with this, or troubleshoot it more. I don’t care about the engine light as we don't have emission requirements. Now that I know the compression is good, I'm not so worried about it.
For my 2007 Liberty 90,000 miles was the Injector electrics. For some dumbass reason I didn't ohm the #1 Injector leads. When i eventually did, it ohmed at 148 instead of around 12.5. So that explains why I had low rpm misfires under 500rpm. Likely upon startups, bc it started and idles fine. Doesn't miss otherwise.
Bought reman Denso 6-pack on ebay for $72. I'm just replacing that one Injector #1 bc I'm like that, so I'm gonna try to do that without having to remove anything but the #1 and #3 coils and fuel rail bolts on both sides. Maybe the air intake if necessary.
Excellent video, I’m looking into new injectors now, because of you I think I found the ones I’m going to go with!
Those particular injectors from the Ecotec engines are easy to find at Pick-A-Part
martinbuilt that’s great to know! Which one is better the one in north Vegas Henderson in your opinion?
@@codygay3412 North Vegas has a bigger selection, I go to Henderson most of the time because it's closer.
What a great channel. I’m going to try this on my 08 Liberty 4x4. The stock gas mileage and power are really lacking. Thanks.
Thank you. This injector may be a little much from a 3.7L V6. You may want to go with the Bosch 280156161 injector.
Be doing this tomorrow - hardest part is getting those dang injector plugs off without snapping the plastic tabs and jacking up the harness! But I appreciate all the tips - I'll see if mine will run into the clip issue that you described. Cheers
Nice videos really like the detail you put into them. Please let us know how you like these injectors after you get to run them for awhile.
Thank you...I let you know.
Curtis Brown
hi Curtis I took the Jeep out to LA and San Diego this past weekend for spring break with my daughter. We were able to get right at 25 miles a gallon round trip that is interstate and City Driving in LA area. Way better than the 894 Bosch injectors I had in there. A matter of fact I had to put O2 extensions on the rear to O2 sensors when I had the 894 s.. this time it through a code for the rear O2 sensors saying that they were reading too much oxygen so in other words I have to remove the extensions which is a good thing. very happy with them
I just got the denso injectors today going to put them in tomorrow
Just want to chear some info.. I am battling with my wj with some rought idle problems.. starting to change some sensors .. by switching the ignition 3 times on and of my jeep keep on showing “ done” which means nothing wrong ... today I have received my diagnostic tester or code reader ... the moment when I have plug the OBD reader into the car ... my wj start showing fault codes.. that means that although your jeep show done that doesnt mean there are no faults
Get a can or carb and choke cleaner and spray the intake butterfly as well as the intake idle air passage down and the idle will straighten out. Dirt and carbon will build up in those area's and it will choke the idle down till it starts to sputter and die but will run fine off idle. My 03 dakota seems to have the issue creep up about once a year and hosing things down and cleaning the butterfly off really helps. The last time I did it I used Seafoam and it seems to have lasted a little longer than just carb/intake cleaner did but the cost is a bit higher. I think it stays in there and cleans a little longer rather than just evaporating off and leaving crud behind.
Thank you sooo much for the most descriptive videos I've seen! I plan on doing many of these mods to our WJ soon but I was wondering if you of a similar injector swap for a 99 ram 1500 5.9L? Soon as I saw the list of completely different makes not to mention 4bangers injectors you matched I thought "Wow! That's some crazy crap I'd do". FYI 70' C10 tailgate fits my 77'f150 quite nicely. Just move the brackets over too. Sorry I don't have questions on the jeep yet. Ya kinda answere them before I think to ask. Wife's gonna love her jeep so much more when I get these done!
I finally completed this modification in my 2006 Jeep Commander (4.7) and it's night and day difference. Have a question, it takes a little longer for engine to start on start up and at idle the engine runs a little rough, but on the open road it just screams! It threw a code that the engine is running rich, I'm assuming all of this is due to the ECM still learning and like you mentioned in your video will take about 50 cold cranks for the engine to relearn? Thanks Martin, I don't believe I could have done with this without the help of your videos.
How much of an increase in milage have you seen? I’ve considered the same on my 3.7 Commander. Did the rough idle ever work itself out?
Yes, has it gotten better??
Yes, most definitely. @@timothygarza3699
50 cold starts before it runs right? That's scary. Great video.
Great video Martin! Your videos have been very helpful to me while rebuilding my 4.7 - How well did these workout for you now that they've been in for a while?
Thank you, yeah they've been working out great for me. And are a great choice for a modified 4.7
I Need Big Help Martin! I got the 12 hole injectors took them to a injector cleaning machine they were good i installed them in my 06 dakota with the 4.7HO it ran fine the first start, the second time it is burning rich and misfiring very badly and tapping like a lifter tap please help!! I am going to put the old injectors back in and see I disconnected the battery and everything!
I found the problem i broke loose carbon when i did the injector swap and held the valve open momentarily and made the rocker fall out!
Nice video you explained every details. Thanks
Thank you. I'm glad you liked it and found it helpful.
Sei un grande 👍 sei un artista
Another great video!! I plan on doing the spark plugs at the same time. Thank you!
Thank you, I appreciate that. 🙂
Hey Martin, just wanted to say thanks for your videos, they helped me alot. Did my sparkplugs and injectors today, the Jeep runs smooth again after running a little rough, must have been the injectors. BTW, they were extremely tough to get out of the head on the passenger side, only managed to get them out individually with pliers and a little brute force but it worked out in the end. Wonder if you came across that at some point as well. Anyways, thanks again :)
Glad to hear it worked out for you. I have had some come out hard in the past but not that bad.
Thanks video was really helpful
Glad to hear it!
I'm down on power, and computer is throwing a dead O2 sensor code. So hopefully just replacing the O2 sensor with a Denso (2344744) will solve the problem... If I still feel a lack of power thanks to this video I have a pretty good idea now on what to do with the injectors. (Thank you btw)
awesome video.so straight forward and clear....awesome tips to thank you!!!
I am glad you liked the content. Thank you for watching.
How about on Hemi 5.7 what part number to use for a 12 hole on the Hemi? Thanks
Thank you Martin
You're welcome I'm glad you liked it and found it helpful thank you for watching.
Real good videos !!!👍👍👍
Professional mate, great video.
Hey I appreciate your videos and the knowledge you share most of the time. But i wanna let you know that i dont think you are actually getting the milage stated. The computer thinks that is what you are getting because it is decreasing the fuel output because the injector is putting out more fuel then the computer is accounting for. So that is why you feel more power because it uses more fuel. And the computer thinks its putting less which is why it tells you that you are getting better mpg as well. Unless that MPG is hand calculated at the pump after each fill up then that is what must be going on. Let me know what you think if i am missing something! Thanks.
Alan Thanks for your input, You are most likely right about most of what you are saying. The overhead display is not reporting a accurate MPG, but the injectors that I installed are not using more fuel. The ECM will adjust the timing of the fuel injectors to deliver the proper amount of fuel by shortening or lengthening the amount of time the injector stays open. The 12 hole injectors have a better stray pattern for better atomization which in return should give better performance, MPG, better idle and throttle responce.
martinbuilt ok that is understandable so have you taken any mpg readings during fill up to calculate your real mpg? I would be curious to know what you get considering i see how well maintained your jeep is. I just got a 2004 4.7 h.o that needs a lot of maintenance items to get it up to par and i see around 12 mpg for my first couple tanks.
Im doing this upgrade as I type this
Great trick on fuel rail thanks martinbuilt
Thank you, glad you liked it 👍 😊
I found 12 hole injectors Denzo’s 12582704 all 8 of em @ 6.00 + 1.00 core charge WOW I lucked out.
I did look for the Chevy and Pontiac ones only found 8 of them but then clips on the Chevy or Pontiac have very beefy clips nice and Chrome too. Better clips than Jeep’s. Also I have a nice chrome fuel rail some time ago. Thanks for all your videos martinbuilt.
Buen día todo los videos que muestra son espectaculares muy ilustrativos y lo explica muy bien, tengo un Jeep Grand Cherokee 4.7 v8 gasolina, sobre los repuestos casi no hay problema en conseguir, lo que es difícil es conseguir son mecánicos que tengan el conocimiento y el equipos necesario para dar mantenimiento. Gracias por sus videos que tenga muchas bendiciones.
Thank you, Cesar. I'm glad you like and find these videos helpful. Have a wonderful day. 🤗👍
Just discovered your videos and they're very interesting and educational. By the way I have an issue I've just now developed today where my 03 Dodge Dakota will not rev past 3,500 and starts to buck and chug. No oil pressure loss, just can't get it above 3,500 as to hit a passing gear past 85.
Thank you. I'm glad you liked them. I am assuming you have no service engine light on. I would start by checking the fuel pressure.
Great video.. by the way did you get the instructions on resetting your ecm with the injectors or you search it up
Thank you, I looked it up.
Awesome video, thanks !!!!
Thank you!
Just wondering how many folks have done the denso swap and and experienced crazy rich conditions with -35% long term fuel trims?...
I was so pumped to do this mod but unfortunately my 06 WK pcm wasnt having them. The only mods I have are a custom CIA and 3 inch exhaust with hi-flow cats and straight through muffler.
I have noticed anyone that has complained about a rich condition using these injectors has the NGC ECM apparently the four plug ECM does not have the tolerance to adjust for these injectors like the early 3 plug ECM.
Aloha from Hawaii Martin, very informative videos. Thanks for the great uploads. I recently purchased a 03 jgc 4.7 2wd with 68,000 miles, now had engine light come on for evap. Was hoping you could do a video getting to the canister hoses? thanks!
check behind the right headlight, hose junctions to cruise control and beneath to the evap block. you may need to pull the bumper cover off to get to it but can without.
Just my findings! NEVER,NEVER,NEVER top off your fuel tank by putting more fuel in after it clicks off. Try to fill up when your going to drive far enough to use at least 1 gallon of fuel. If you put too much gas in your tank (especially in warm climate) your gas will expand and can saturate your EVAC system. (very expensive) and I do not know if you can dry it back out without replacing it. Also be sure your gas cap is properly put back on of course!
Hi Martin,
Thanks for the video on injectors install. Please do one on transmission ISS and OSS, and for the Line Pressure Sensor for 99-04 Dodge Jeep. And one as well for the ABS Sensors for the same 99-04 if you did already then send the link. That would be greatly appreciated.
still recommend the Denso 12582704 as the best injectors you tried? looks like had a few to try out. $450 is a good nut, want to make sure they are still working out well. AND AGAIN, THANKS FOR THE GREAT VIDEOS. ROCK STAR
Yes I'm still running them but I wouldn't spend 450 for them. Find factory rebuilt ones or get them from your local salvage yard.
Thanks for the video brother .
I'm glad you liked it and found it helpful. Thank you for watching.
Great job thank's for all the help. Chuck
Hello Martin thanks again for these helpful videos I put in the 12 hole injectors in my Dodge Dakota. My fuel trims at idle are around -20 or so give or take. I don’t know if these injectors have something to do with it it’s on both banks. When I put the vehicle under load the trims even out. I was curious if you might’ve had this happen when you installed them I did do a quick learn. Thanks!
Same problem. Not response. My friend had same problem too. -30 long trim .
Sei un grande 👍se un artista
Thank you!
martinbuilt mi trovo in ITALY non riesco ad acquistare flowmasters side EXHAUST for my GEEP GRAND Cherokee 4.7 v8😔
Great explained! I have a loud ticking noise from my 4.7, I think it could be the injectors. Greetings from Denmark!
Are you sure it's not the latch Adjusters (lifters) that are making all the noise very common with the 4.7. And that is something that you really want to fix this soon as possible. If I lash adjuster should collapse it will cause the rocker arm to come out and can do quite a bit of damage to the cylinder head and camshaft.
@@martinbuilt I have replaced all the lifters with brand new ones. What about the timing chain tensioner? The car has 300.000 miles on it :-) thanks for reply!
The average lifespan of timing chain and tensioners is a 150 thousand miles sounds like you're overdue ..lol
@@martinbuilt hi, I have abit of a tick I can hear with window open, on a cold start. Goes away after a bit! Would a oil flush help?
@@terrystratford1235 I would recommend on your next Oil Change use a quart of Marvel's Mystery Oil or Rislone both are great products and see if that helps
Awesome information, I have a 4.7l 2006 Jeep Commander and looking for better HP & MPG. Can you tell a big difference after installing the Denso injectors? If so, would be interested in knowing the results.
I'm very happy with them. They are better then the Bosch 280155894 by .3 to .7 MPG and alot better then the stock ones.
Thanks for the video and where is the cheapest place to buy injectors for my 2002 jeep Grand Cherokee 4.7. Thanks
Andy Elwood ebay
A huge thank you for this video!
My jeep GC 4.7 HO 2002 160000km loses pressure in the fuel system, I have already changed the fuel filter and I think there may be a leak on one or more injectors (it smells like fuel).....
Does the 4.7 HO need special injectors? Which ones do you recommend? Well hello from France, fortunately you are here in the US to show us how to repair our machines!
pas de réponse particuliere ,juste pour te dire que je suis comme toi de france ,lyon abonné a martibuilt car c'est le meilleur pour les 4.7l grand cherokee pour ton probleme il ya jean marc de (jeep garage) youtube qui a traité ce probleme sur son 4.7l et qui lui aussi et très bon.
nice work man
Thank you 😊
So, in your experience, which ones are the best overall match, without the computer getting funky, or setting a CEL?
Would you (which would you) recommend for non-modified 4.7's..? Or would adding the HO cam's/Intake/heads work better,.. with which injector?
I'm looking to improve the injectors in both my '00 4.7 (vin N) Durango SLT 4X4 , 231 Xfer case, 545-RFE , 3:55 gears, as well as those in my latest project, a '02 WJ Limited 247 Xfer case, 545-RFE and 3:73's..which may end up with a 242 HD Xfer case..
I would go with the Bosch 280156161, they will work with both stock and modified engines.