There's a CAT dealer mechanic in Idaho named Josh and he's got a youtube channel "AdaptApe". Very sharp guy, was responsive and helpful over email when we had an issue with a 550hp E model. This is the very type of thing he would be able to diagnose. Best of luck to you!
I had a similar problem on a Cat mot or, but it was an older one {1996). Mine was the check valve in the return line on the back of the fuel rail. Basically, the check valve would stop working intermittently and allow too much fuel out of the rail to be returned to the tanks and not maintaining enough pressure to the injectors. It was an inexpensive fix, but I’d already thrown lots of money at it before we figured it out.
I'm not a truck driver and I know nothing about diesel engines. But I do know that frustrating feeling. When you have tried, replaced and paid lots of money on every possible thing to solve an issue with your means of transportation. Still, that issue persists and you are out of ideas and patience.....and money. Good luck and let's hope it gets solved for good asap. Stay safe and greetings form Mexico.
Yeah whenever you were sitting on the side of the road at 13:25, if you listen real carefully you can tell it’s definitely dropped a cylinder. That sucks man! Hopefully you get it fixed.
I know you've thrown alot of parts at this thing over the years and went through alot of frustration. I say get it on a dyno and monitor everything with ET. There's a excellent shop in the states called Pittsburgh power. They are experts at diagnostic problems .They have a dyno and all the equipment to pin it down. It would be something to consider
@Flying DutchWoman I am well aware where he's located and have followed him for years. He does get to the state's. It may be worth letting these people look at it instead of dumping more parts into it
Brother I feel your pain. Been firing the parts cannon lately...as much as funds will allow. I have air getting into the fuel,,,causing running and starting issues. Next we try injector seals. I hope you find the cause of your issues, its hard to be motivated sometimes with this kind of stuff going on, but hold on to that positive attitude and keep on trucking, its a great classic looking truck you got
Sure hope you get it worked out , no bigger headache been having a problem that you can't solve, I hope you're definitely on to something with the fuel underneath the passenger side, stay safe keep the videos coming
Hey Matt maybe replace the springs in the pressure release valve that might be a cheap fix There is a good episode on the Adept ape channel about fuel pressure problems on a C15 It could be that the fuel pressure and it missing are connected I would replace the release springs then the pump after the fuel pressure problem and it still misses I would look at the ECM good luck mate The beautiful old machines it is a love hate relationship Cheers Johannes
Buddy i love how you wave to all trucks passing by. Reminds me of old school trucking. How many waves back do you get nowadays? 10% maybe? Not what it used to be.
What's up driver, man that is unbelievable the amount of trouble you are having with that engine. What about checking your fuel tank caps. Could they be letting in too much air and forcing a vapor lock or something like that. I don't know how to fix your problem, just trying to think. Good luck and hopefully you get it figured out. Stay safe out there my friend and keep the videos coming and always travel safely catch you on the next one.
I would check the check valves on the filter base, if that doesn’t do it maybe fuel pump spring is getting weak but that wouldn’t cause an injector to cutout after shifting. The only thing that could really cause it to cut out after a shift could be the ECM and then when you take the load off it by pushing the clutch in it trucks the ECM out and make it run normal. It could also be the fuel temp sensor since it is becoming more of a problem with the hot weather
2006 mxs here. Here’s what i replaced 1 injector fuel pump all Fuel lines the check valve. Then injector wire harness and main engine harness. Still no fix. Ended up using some algae cleaner stop using cat filter and added 1 new injectors. She runs like a dream now
Great channel love your videos! Welcome to the money pit we know as owning your own truck! lol, It never ends! Working paycheque to paycheque and dumping most of it into the truck just to keep it on the road!
Matt if your fuel tank filler neck doesn't have screen in them , check make sure someone hasn't dropped a rag down in your fuel tank , it will shut it down then let it run as the fuel sloshes .....seen people get mad at someone and do that .
Sounds like an issue with the ventilation considering its happening on hot days. the pump can get stymied by negative pressure. You could try slightly loosening the fillercap see if that does anything.
When you figure out what is going on, let me know. I have a same thing with my T2000 for over two years now All, I did is to fix it is to bypass primary fuel filter with just the hose and just use secondary filter , end it seems to fix it. You’re getting air in the system. For the fuel pressure, you could stretch the spring on the fuel pressure regulator
from my past messing with diesel engines this is what i think your issue could be faulty regulator, a fuel pump malfunction or problems with the fuel lines.
Hi from England 🇬🇧, I don’t know anything about Peter built trucks or cat engines but I’m sure there would be a similar component - I had fuel pressure issues on my 1ton Navara, I think the American market call it a Frontier? Anyway, after a lot of head scratching found an online article and ended up replacing the suction control valve which regulates fuel pressure in to the high pressure pump before the injector rail. Turns out it’s a fairly common issue on these trucks and took the cleaver people a while to find it in the first place. Hopefully you’ve found the problem with the pick up lines on your near side tank though! Keep up the great work 👍🏻 Be lucky
I had a B model Cat that started having fuel issues and finally got till it would only idle I cheked the fuel pump filters lines replaced any suspect lines still nothing. Called cat talked to a mechanic he said check the hand pump there are two check valves in there that can screw up,sure enough one was loose and sideways plus the pump was bad I replaced it and problem solved. They have probably updated that thing and back then the fuel pressure was about 40psi but might be worth a look.
Great channel. On the fuel pressure, have you checked out the fuel pressure regulator? I had one on an older Ataac Cat that gave me fits. Felt like an injector went south for the winter.
I hate seeing guys worry about their machines and end up going to the stealership to be taken advantage of. Matt if you havnt done so already and the fuel seep on your tank isnt the fix. Your secondary fuel filter housing on the return to tank pipe side is a regulator valve, the valve unscrews out from under a plug it is a non serviceable component which is replaced. these valves are problematic on the acert engines and cause any number of intermittent fuel issues from occasional no start to loss of full power and in your case injector drop out which is no surprise. If it was air in the system from the supply line you would end up with a empty primary fuel filter cannister and have problems hot or cold. And by the way... monitoring the pressure gauge has diagnosed the problem for you. well done.
Cold weather seem to work fine, when its hot the fuel pressure is a problem. As well under load it have the problem but with out it just pulls normal. I wonder if the amount of fuel is needed to pull heavy or lite is different.. Does your truck regulates "faulty regulator" how much fuel it brings in to the engine? maybe something that might be controls or the system?.... Look at the ending part, I wonder if the hose in and out of the tanks needs to be changed as well the fitting. but that is a good start. The change of hoes and fitting, should not cost so much I bet if it only that.
What type motor if it is a newer car it might be the second darey fuel pump acting up had a smaller problem on a cat motor cat hooked up the laptop but would not replace the secondary pump till it got out of the tolerance that have set up ,but then the motor basically just would not hardly run .then cat checked it again then the reading was low enough to replace. But that was under warranty at that time. Hope you get it figured out. keep up the good work.
I thought I saw you at the newer scale house on the Eastbound side in Ganaoque on early Friday morning sleeping. It looked like your truck and trailers.
I had a problem with my farm tractor. Turned out to be a huge bug, hornet maybe, that had got in the tank somehow, gone rock hard in the diesel and sunk. As demand for fuel rose, it would randomly get sucked to the fuel hose, partially blocking it. Tractor would run but the clear sediment bowl would empty leaving a vacuum eventually losing power. Let off power demand or switch off and it would usually clear. The dealer was trying to diagnose the issue and flushed the tanks out but didn’t find the bug. Eventually I put an endoscope in the tank ( pick up is in the crossover pipe) and there was the bug again. Stripped it down, cleaned out bug parts, ran great for over a thousand hours until I traded up.
I’m not a diesel tech but I am a rally mechanic, and we had an issue that kept happening on a flat 6 swapped Subaru where we were losing cylinder 2 almost every run, and it was a really hard to track vapor lock issue with fuel boiling off in the rail, so I’m wondering if your theory with the head overheating would be the culprit
We will know something is crazy wrong when you finally lose your cool. If only I could take a page from your book; any mechanic stuff I do always comes with a healthy dose of swearing... 😂
check How much turbo pressure dropping when the injector cuts off when you have a good idea of what the problem is and also give less fuel when change gears then see
Good luck getting your truck fixed take it in to a mechanic what a pain in the ass reviving the truck doesn’t seem like a good idea you need to win the lottery and buy a new truck hope you get it fixed soon here from Ontario Canada ❤️❤️❤️🇨🇦🇨🇦😎
I bet a new truck cost tons of money is it like a mortgage those days I seen a truck drive he told me his truck cost 400,000.00 it’s a Kenworth double sleeper has all the toys
Just my ten cents worth here retired truck mechanic from Australia sounds to me like you have the internals of a fuel line colapsing so it will not deliver enough fuel to the injector pump and why you think there is one injector out is that may be a weak plunger in the injector pump so to find the crook cylender check the temp on each one of the exhaust outlets on the manifold and the one that has the lowest temp is your prob only check this when it plays up to get a proper reading
Seems like my neighbor had issues with his Peterbilt and it was the valve on the draw from the fuel tank. The valve was to keep the fuel tanks level.That one picture of your tank, when you were fueling, was that your fuel draw or tank heater lines? If that is your fuel draw I would eliminate them valves. Also if your tanks have draw tubes from the top of the tank to the bottom I have seen them get crap in them and have seen them get a hair line crack in them
Hate it when injectors are out. Yeah it does sound like a fuel issue here like you say but I dont have any extra knowledge to drop on you. Ive had to drive a hundred miles with a couple trucks in the past with an injector gone and even bobtailing can be a chore then.
I'm a new subscriber and just saw this. I assume you have it fixed by now, but if it's still acting up, I wonder if you just have one injector that acts up when it gets up to a certain temp?
Another thing don't you have a pedal sensor under the gas pedal?? Maybe it shortening it self out which will cost it to fall flat on face like it struggling for power.
Next time you shut it down you prob have it fixed by now but old trick is crack the fuel filter in the morning see if your filter is full or you hear a vacuum had that happen pin hole in my metal in filter housing and also had fuel line collapse in linnet
Change your fuel filters I heard you say they get changes at oil changes but some times you pick up dirty fuel and they need changing it’s all the symptoms your having
Hi, I am new to your Trucking Chanel I suggest you checked the Fuel & Air Filters the Pick Up Lines Between The Diesel Tanks. I also Suggest that all Fuel Injectors to be cleaned or Changed. With Regards. Bazz From The UK
I think at this point a new cheap little fuel gauge is in order. It doesn't have to say caterpillar on it and go from there. If it confirms low pressure then the fuel system is to suspect and not so much injectors.
my school district had a bus that going down the highway the bus would basically hop down the road. the bus went to the shop about 30 times and nobody could figure out what it was until they put a set of tires on the thing and she was as smooth as glass after
Top quality qualified maintenance/repair shops are few and far between today sadly. I think you'll soon know that truck inside out and be able to do most of the repairs yourself .
For me 80% of the issue was the fuel pressure gauge, it was leaking fuel out and air into the system, all while giving a false low reading. It still does it on hard pulls though so something else is still going on
04 BXS similar issue makes a weird thud/tap/ noise when on the throttle. stops when you get off. Changed two injectors. Still loosing one injector. No codes,swapped ecm, fuel tank cleaned,keep us updated.
I think your peterbilt 379 is dying when it’s having trouble full diesel power throttle I hope your semi truck is doing good 😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎
Take your fuel pump apart and put a new spring kit in. Did you ever put a new Fluid damper damper on your engine. They are American made. Engine builders say that you should change them every 500 to 750 thousand miles. Caterpillars are usually pulling around 80 to 100 pounds of fuel pressure when running down the road. Just Saying. GOOD LUCK with your project. 👍🇺🇸 Worst case. You probably should find a shop with a dyno and give it some good test pulls. !
wish i had a way to contact you besides utube. i've got an idea but utube won't let me post it it because i'm recommending a commercial repair shop...🤔
What happens if you shut it off and prime with the hand pump up to 90 and try it? I know exactly what you are talking about. They run a lot better at 95 psi I know. Definitely need to find out exactly how much fuel pressure it is.
You have some internal issue going on like a crack head or timing issuees going on did you check to see if drive shaft sync up with each other if they don't line up with each others that would cost the vibration because of unbalance
Forgive me if you’ve already mentioned it, but what have you done to the actual injection pump itself? How old is it? Maybe there’s an issue with the injector actuating. Is it electronic or oil actuated like in 6.0 Powerstrokes?
I think you might have a fuel pump behind the diesel tank that pushes it up to the engine fuel pump that feed the injectors if not coolant might be getting into the cylinder head.
I think you have more problems other than low fuel pressure. You injectors would fire just fine even at 30psi to the injection pump. As long as the injection pump has fuel it will pressurize the injector enough to make it pop. Even if your fuel pump stops working the injection pump would still siphon fuel under its own suction. So just having one injector fail tells me its not just one isolated incident or problem. You have multiple issues. Plus I dont think its an injector failing, I am willing to bet you have a jake brake failing in one cylinder causing a valve to stay shut and go dead and the fuel pressure is a separate issue.
There's a CAT dealer mechanic in Idaho named Josh and he's got a youtube channel "AdaptApe". Very sharp guy, was responsive and helpful over email when we had an issue with a 550hp E model. This is the very type of thing he would be able to diagnose. Best of luck to you!
I had a similar problem on a Cat mot or, but it was an older one {1996). Mine was the check valve in the return line on the back of the fuel rail. Basically, the check valve would stop working intermittently and allow too much fuel out of the rail to be returned to the tanks and not maintaining enough pressure to the injectors. It was an inexpensive fix, but I’d already thrown lots of money at it before we figured it out.
You'll get it ironed out...the old cat is worth the effort. Love the channel. Making this former trucker yearn for the road........
I'm not a truck driver and I know nothing about diesel engines. But I do know that frustrating feeling. When you have tried, replaced and paid lots of money on every possible thing to solve an issue with your means of transportation. Still, that issue persists and you are out of ideas and patience.....and money.
Good luck and let's hope it gets solved for good asap. Stay safe and greetings form Mexico.
Yeah whenever you were sitting on the side of the road at 13:25, if you listen real carefully you can tell it’s definitely dropped a cylinder. That sucks man! Hopefully you get it fixed.
A couple of things you might check that will effect fuel pressure are clogged tank vents and old fuel lines from tanks to engine collapsing.
Yep all fuel lines have been replaced from the tanks to the primary filter
I know you've thrown alot of parts at this thing over the years and went through alot of frustration. I say get it on a dyno and monitor everything with ET. There's a excellent shop in the states called Pittsburgh power. They are experts at diagnostic problems .They have a dyno and all the equipment to pin it down. It would be something to consider
@@scottbaker1018 considering this guy is in Canada that might not be an option
@Flying DutchWoman I am well aware where he's located and have followed him for years. He does get to the state's. It may be worth letting these people look at it instead of dumping more parts into it
@@callthemall could it be the injector pump and fuel pump that are the issues
Brother I feel your pain. Been firing the parts cannon lately...as much as funds will allow. I have air getting into the fuel,,,causing running and starting issues. Next we try injector seals.
I hope you find the cause of your issues, its hard to be motivated sometimes with this kind of stuff going on, but hold on to that positive attitude and keep on trucking, its a great classic looking truck you got
ive seen this happen in a small truck, was a pinhole in the fuel lines. Just a thought, dont let it die man! beautiful truck!
Sure hope you get it worked out , no bigger headache been having a problem that you can't solve, I hope you're definitely on to something with the fuel underneath the passenger side, stay safe keep the videos coming
Hey Matt maybe replace the springs in the pressure release valve that might be a cheap fix
There is a good episode on the Adept ape channel about fuel pressure problems on a C15
It could be that the fuel pressure and it missing are connected
I would replace the release springs then the pump after the fuel pressure problem and it still misses I would look at the ECM good luck mate
The beautiful old machines it is a love hate relationship
Cheers Johannes
Buddy i love how you wave to all trucks passing by. Reminds me of old school trucking. How many waves back do you get nowadays? 10% maybe? Not what it used to be.
Was just wondering the same thing. I’d imagine most come from similar rigs whereas not so many from the newer plastic trucks!
What's up driver, man that is unbelievable the amount of trouble you are having with that engine. What about checking your fuel tank caps. Could they be letting in too much air and forcing a vapor lock or something like that. I don't know how to fix your problem, just trying to think. Good luck and hopefully you get it figured out. Stay safe out there my friend and keep the videos coming and always travel safely catch you on the next one.
I would check the check valves on the filter base, if that doesn’t do it maybe fuel pump spring is getting weak but that wouldn’t cause an injector to cutout after shifting. The only thing that could really cause it to cut out after a shift could be the ECM and then when you take the load off it by pushing the clutch in it trucks the ECM out and make it run normal. It could also be the fuel temp sensor since it is becoming more of a problem with the hot weather
2006 mxs here. Here’s what i replaced 1 injector fuel pump all
Fuel lines the check valve. Then injector wire harness and main engine harness. Still no fix. Ended up using some algae cleaner stop using cat filter and added 1 new injectors. She runs like a dream now
Great channel love your videos! Welcome to the money pit we know as owning your own truck! lol, It never ends! Working paycheque to paycheque and dumping most of it into the truck just to keep it on the road!
What the heck!! i was literally watching the last vid at 20lK Subs
!! man you are doing a good job matt keep up the good work!!
I dont know enough about your problem to help but I do hope you manage to fix it.
Fuel injectors produce an injected fuel spray pattern.
If the pump pressure is not up to snuff. An injector probably will stop or blow a weak pattern.
Holler at Josh 'ADEPT APE'. Don't think he'll mind helping out a fellow TH-camr.
Matt if your fuel tank filler neck doesn't have screen in them , check make sure someone hasn't dropped a rag down in your fuel tank , it will shut it down then let it run as the fuel sloshes .....seen people get mad at someone and do that .
Sounds like an issue with the ventilation considering its happening on hot days. the pump can get stymied by negative pressure. You could try slightly loosening the fillercap see if that does anything.
When you figure out what is going on, let me know. I have a same thing with my T2000 for over two years now
All, I did is to fix it is to bypass primary fuel filter with just the hose and just use secondary filter ,
end it seems to fix it. You’re getting air in the system.
For the fuel pressure, you could stretch the spring on the fuel pressure regulator
from my past messing with diesel engines this is what i think your issue could be faulty regulator, a fuel pump malfunction or problems with the fuel lines.
Hi from England 🇬🇧, I don’t know anything about Peter built trucks or cat engines but I’m sure there would be a similar component - I had fuel pressure issues on my 1ton Navara, I think the American market call it a Frontier?
Anyway, after a lot of head scratching found an online article and ended up replacing the suction control valve which regulates fuel pressure in to the high pressure pump before the injector rail. Turns out it’s a fairly common issue on these trucks and took the cleaver people a while to find it in the first place.
Hopefully you’ve found the problem with the pick up lines on your near side tank though!
Keep up the great work 👍🏻
Be lucky
I had a B model Cat that started having fuel issues and finally got till it would only idle I cheked the fuel pump filters lines replaced any suspect lines still nothing. Called cat talked to a mechanic he said check the hand pump there are two check valves in there that can screw up,sure enough one was loose and sideways plus the pump was bad I replaced it and problem solved. They have probably updated that thing and back then the fuel pressure was about 40psi but might be worth a look.
Great channel. On the fuel pressure, have you checked out the fuel pressure regulator? I had one on an older Ataac Cat that gave me fits. Felt like an injector went south for the winter.
Sounds simplistic, but I would definitely start running eather Power Service or Howes fuel additive to your tanks.
I hate seeing guys worry about their machines and end up going to the stealership to be taken advantage of. Matt if you havnt done so already and the fuel seep on your tank isnt the fix. Your secondary fuel filter housing on the return to tank pipe side is a regulator valve, the valve unscrews out from under a plug it is a non serviceable component which is replaced. these valves are problematic on the acert engines and cause any number of intermittent fuel issues from occasional no start to loss of full power and in your case injector drop out which is no surprise. If it was air in the system from the supply line you would end up with a empty primary fuel filter cannister and have problems hot or cold. And by the way... monitoring the pressure gauge has diagnosed the problem for you. well done.
Just re watched this and was wondering if you had any update on it and what you finally found to be your issue. Thanks, Parker
Bad injector all along!
@@callthemall I had a feeling after I just re watched it and listened to it running. Glad you were able to get her fixed up
Cold weather seem to work fine, when its hot the fuel pressure is a problem. As well under load it have the problem but with out it just pulls normal. I wonder if the amount of fuel is needed to pull heavy or lite is different.. Does your truck regulates "faulty regulator" how much fuel it brings in to the engine? maybe something that might be controls or the system?.... Look at the ending part, I wonder if the hose in and out of the tanks needs to be changed as well the fitting. but that is a good start. The change of hoes and fitting, should not cost so much I bet if it only that.
What type motor if it is a newer car it might be the second darey fuel pump acting up had a smaller problem on a cat motor cat hooked up the laptop but would not replace the secondary pump till it got out of the tolerance that have set up ,but then the motor basically just would not hardly run .then cat checked it again then the reading was low enough to replace. But that was under warranty at that time. Hope you get it figured out. keep up the good work.
I thought I saw you at the newer scale house on the Eastbound side in Ganaoque on early Friday morning sleeping. It looked like your truck and trailers.
I had a problem with my farm tractor. Turned out to be a huge bug, hornet maybe, that had got in the tank somehow, gone rock hard in the diesel and sunk. As demand for fuel rose, it would randomly get sucked to the fuel hose, partially blocking it. Tractor would run but the clear sediment bowl would empty leaving a vacuum eventually losing power. Let off power demand or switch off and it would usually clear.
The dealer was trying to diagnose the issue and flushed the tanks out but didn’t find the bug.
Eventually I put an endoscope in the tank ( pick up is in the crossover pipe) and there was the bug again. Stripped it down, cleaned out bug parts, ran great for over a thousand hours until I traded up.
I’m not a diesel tech but I am a rally mechanic, and we had an issue that kept happening on a flat 6 swapped Subaru where we were losing cylinder 2 almost every run, and it was a really hard to track vapor lock issue with fuel boiling off in the rail, so I’m wondering if your theory with the head overheating would be the culprit
We will know something is crazy wrong when you finally lose your cool. If only I could take a page from your book; any mechanic stuff I do always comes with a healthy dose of swearing... 😂
have you checked your fuel tank to make sure nothing is in it. it could be on a hard pull that it is pulling something over the intake line.
check How much turbo pressure dropping when the injector cuts off
when you have a good idea of what the problem is
and also give less fuel when change gears then see
Good luck getting your truck fixed take it in to a mechanic what a pain in the ass reviving the truck doesn’t seem like a good idea you need to win the lottery and buy a new truck hope you get it fixed soon here from Ontario Canada ❤️❤️❤️🇨🇦🇨🇦😎
I hear new truck have worse problems right off the bat nowadays 😅
I bet a new truck cost tons of money is it like a mortgage those days I seen a truck drive he told me his truck cost 400,000.00 it’s a Kenworth double sleeper has all the toys
Replace the Pressure Regulator and check\test the Lifter Pump.
Just my ten cents worth here retired truck mechanic from Australia sounds to me like you have the internals of a fuel line colapsing so it will not deliver enough fuel to the injector pump and why you think there is one injector out is that may be a weak plunger in the injector pump so to find the crook cylender check the temp on each one of the exhaust outlets on the manifold and the one that has the lowest temp is your prob only check this when it plays up to get a proper reading
Seems like my neighbor had issues with his Peterbilt and it was the valve on the draw from the fuel tank. The valve was to keep the fuel tanks level.That one picture of your tank, when you were fueling, was that your fuel draw or tank heater lines? If that is your fuel draw I would eliminate them valves. Also if your tanks have draw tubes from the top of the tank to the bottom I have seen them get crap in them and have seen them get a hair line crack in them
Yep they are draw tubes, frustrating thing is I cleaned it all up, haven’t seen a speck of a leak in the weeks since lol
Hate it when injectors are out. Yeah it does sound like a fuel issue here like you say but I dont have any extra knowledge to drop on you. Ive had to drive a hundred miles with a couple trucks in the past with an injector gone and even bobtailing can be a chore then.
I'm a new subscriber and just saw this. I assume you have it fixed by now, but if it's still acting up, I wonder if you just have one injector that acts up when it gets up to a certain temp?
Inspect you fuel tanks, some time the pick up tube is detached or the strainer plugged up.
Could try a temp gun on each exhaust header runner to locate the lazy cylinder
The fuel pressure regulator could possibly be the problem. The seat gets wore, and the fuel leaks past causing low and erratic fuel pressure.
Another thing don't you have a pedal sensor under the gas pedal?? Maybe it shortening it self out which will cost it to fall flat on face like it struggling for power.
Next time you shut it down you prob have it fixed by now but old trick is crack the fuel filter in the morning see if your filter is full or you hear a vacuum had that happen pin hole in my metal in filter housing and also had fuel line collapse in linnet
I would change the fuel rail and the return lines as well as injectors
Can it be contaminated fuel? Years ago I've seen bacteria in the fuel and it clogs the in-tank filter. Now that you mention temperatures....
A few years ago I found my pickup tube was loose so I tightened it and it put the tube at the bottom and it wasn’t getting enough fuel
Change your fuel filters I heard you say they get changes at oil changes but some times you pick up dirty fuel and they need changing it’s all the symptoms your having
Hi,
I am new to your Trucking Chanel
I suggest you checked the Fuel & Air Filters the Pick Up Lines Between The Diesel Tanks.
I also Suggest that all Fuel Injectors to be cleaned or Changed.
With Regards.
Bazz From The UK
or my be injector actuators . is it throwing any codes?
Exactly why I always drove a company truck. No out of pocket for me.
Good luck brother.
I think at this point a new cheap little fuel gauge is in order. It doesn't have to say caterpillar on it and go from there. If it confirms low pressure then the fuel system is to suspect and not so much injectors.
If you have screens on your tank hose it might be plugged up
clean out fuel tanks?
Have you ever thought of adding a FASS fuel system to increase fuel pressure and volumes?
Exactly what I did on my Cummins, changed everything. Runs better then new.
I agree with you on the fast we put on on are cabover with a 8v92 and it dose make a difference with your fuel pressure
Toromont mate !! Worth the $
Maybe reach out to Adept Ape? He is a cat certified mechanic.
Was just gunna suggest that lol
my school district had a bus that going down the highway the bus would basically hop down the road. the bus went to the shop about 30 times and nobody could figure out what it was until they put a set of tires on the thing and she was as smooth as glass after
Another thing I’ve see holes corroding in fuel tank and it sucked air give her a try
One semi famous TH-cam star Eric O will tell you..”new parts also come pre broken”
Maybe the new fuel pump is broken from the box
How long is it cranking for before it fires up when the engine's really cold?
I miss Ontario sometimes 😕 no lie
Top quality qualified maintenance/repair shops are few and far between today sadly. I think you'll soon know that truck inside out and be able to do most of the repairs yourself .
Please post a update I’m having similar issues
For me 80% of the issue was the fuel pressure gauge, it was leaking fuel out and air into the system, all while giving a false low reading. It still does it on hard pulls though so something else is still going on
04 BXS similar issue makes a weird thud/tap/ noise when on the throttle. stops when you get off. Changed two injectors. Still loosing one injector. No codes,swapped ecm, fuel tank cleaned,keep us updated.
try thowing a jug of ATF in each tank on feul up and run it tkrough this will CLEAN the injectors . do this when your loaded micron dextron
Not true! Old truckers never die
They just have their Peter’s rebuilt 😊
I think your peterbilt 379 is dying when it’s having trouble full diesel power throttle I hope your semi truck is doing good 😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎
turn off the tank valves and run on one tank at a time to see if that isolates the problem
Take your fuel pump apart and put a new spring kit in. Did you ever put a new Fluid damper damper on your engine. They are American made. Engine builders say that you should change them every 500 to 750 thousand miles. Caterpillars are usually pulling around 80 to 100 pounds of
fuel pressure when running down the road. Just Saying. GOOD LUCK with your project. 👍🇺🇸
Worst case. You probably should find a shop with a dyno and give it some good test pulls. !
Put in some fuel additives to clean out injectors etc
wish i had a way to contact you besides utube. i've got an idea but utube won't let me post it it because i'm recommending a commercial repair shop...🤔
PITY YOU HAVE Not got a pyrometer for all 6 pots, i only know Cummins from the 70's 180 psi on the pump, watch your stack, air means white smoke
What happens if you shut it off and prime with the hand pump up to 90 and try it?
I know exactly what you are talking about. They run a lot better at 95 psi I know.
Definitely need to find out exactly how much fuel pressure it is.
have you checked your fuel pumps?
JC SMITH PROJECTS has a great channel….very knowledgeable….maybe send him a note….may be able to help
& @AdeptApe is a knowledgeable CAT mechanic.
Been following adept ape for a LONG time!!
+1 for JC. He's very good at diagnosing things like this. I've learned so much from his videos.
Do you have an ECM? It's the injectors brain. Had to have that changed for dropping injectors.
I would take the peterbilt to the nearest dealership and have the problems addressed
Frustrating when you throw enough parts at it to have a nearly new machine & it still won't run right.
You on 35 South of Lindsay today?
Yeppers!
@@callthemall that’s cool I just started watching your videos a few weeks ago.
I need those pipes
You have some internal issue going on like a crack head or timing issuees going on did you check to see if drive shaft sync up with each other if they don't line up with each others that would cost the vibration because of unbalance
with the shake might wanna check steering components, ball joints, kingpins, pitman arm all the stuff
Shake-ometer 5000 …..lmao 😂😂😂😂😂😂😂😂😂😂😂
Forgive me if you’ve already mentioned it, but what have you done to the actual injection pump itself? How old is it? Maybe there’s an issue with the injector actuating. Is it electronic or oil actuated like in 6.0 Powerstrokes?
Meaby it is time for an engine and components rebuild
I think you might have a fuel pump behind the diesel tank that pushes it up to the engine fuel pump that feed the injectors if not coolant might be getting into the cylinder head.
I think you have more problems other than low fuel pressure. You injectors would fire just fine even at 30psi to the injection pump. As long as the injection pump has fuel it will pressurize the injector enough to make it pop. Even if your fuel pump stops working the injection pump would still siphon fuel under its own suction. So just having one injector fail tells me its not just one isolated incident or problem. You have multiple issues. Plus I dont think its an injector failing, I am willing to bet you have a jake brake failing in one cylinder causing a valve to stay shut and go dead and the fuel pressure is a separate issue.
NICE BRO
Sounds like pump problems losing pressure u lose injector
🙏🤞✊️
Intermittent problems are the worst
Sounds like a turbo problem to me just saying or maybe a the fuel rail.? Is that a C15 cat under the hood.?
Didn't you just have the motor done
3 years ago now yeah
you have a bad injactor or pump
I love you from pakistan❤🇵🇰
You need to treat yourself to a new rig bro or new used rig. And keep this girl for a spare