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Sputtering 6.0L

18131 Views 32 Replies 4 Participants Last post by  see error, 
S
First off I would like to say hello to everyone I just signed up I have been looking on here for 2 days and I seem to be going in circles with the issue i am having. My truck is a 2004 6.0l it has 127k on it and i bought it on tuesday. On wednesday I was sitting at a traffic light and it started skipping when i hit the gas it seems to run fine then when it is in overdrive it shudders bad until i push the gas and it downshifts it also stops when i put in tow/haul mode. The problem seems to be when below 1800 rps. Now the history the po told me is he replaced the injectors, ficm, egr cooler delete. I removed the egr and cleaned it it was really gummed up. I started it with egr unplugged it runs the same so i plugged it back in. I unplugged the ICP and it still ran the same. Any ideas I know there are problems with 6.0l but i thought i would get more than 1 day out of it. Thanks Chris
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dieselmac
Here's the TSB that covers it: http://ww2.justanswer.com/uploads/apjp02/2010-08-22_204005_tsb08-23-01.pdf

And here's a good link to coolant flushing in general: http://home.comcast.net/~lyon.family1/truck/Powerstroke%20Cooling%20System%20Flush%20v1-0.pdf
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S
sure glad mine does not look like that mine is like dirty water with some particles floating in it
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S
Why everything on this truck so difficult 3 fuel pressure testers and none fit. Everything is expensive you might think with all the same failures the parts price would go down. Is there a wat to test the ICP voltage or ohm or just a test procedure. if i unplug tie ICP does it need to run for a bit for the computer to go into default?
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SIX_0
I never let my truck run lower than an 1/8 of a tank any lower than that and i get sputtering might just be something funky on my truck. :jester:
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dieselmac
see error said:
Why everything on this truck so difficult 3 fuel pressure testers and none fit. Everything is expensive you might think with all the same failures the parts price would go down. Is there a wat to test the ICP voltage or ohm or just a test procedure. if i unplug tie ICP does it need to run for a bit for the computer to go into default?
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It's an M12x1.5 fitting. Look for a M12x1.5 to 1/8"NPT Female transition fitting.

You can use a volt meter to read ICP. Look in the no-start sticky at the top of this forum. The directions are in there.

Not sure if there's any sort of delay in the PCM when going to the default pressures. I bet it's pretty quick though.
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S
I also notice occasional hard shifts i am only mentioning everything i can think of so maybe we can figure this out. I am going to order rev x tonight i wish they sold it locally.
I went through every fuse all good. I switched all the relays around incase it had a bad one no change. I unplugged the ICP and no change. Been driving with the egr unplugged and no change either also no CEL and no codes on the scanner.
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S
ok i installed the scangauge II these are some of the readings i got i did not drive it just idle warmed up

ICP-580
FMP-47.5 to 48.5v
FLP-12.0-12.5
IPR-22.1
EBP-18.5-18.8
MFD-9.6-11.4

do these look normal?
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dieselmac
Those actually don't look that bad. Nothing jumps out as a smoking gun.

Any codes??
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S
No there hasent been any codes, or smoke i did notice the ait cleaner is not dealed right due to broken latches and the filter gauge is missing but it has been like that since i bought it and it ran good.
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S
I have been monitoring some things on the scangauge and i dont know what is normal because my pid value list dont have boost and ebp
max boost i have seen at WOT is 18.0 and EBP was 49 and when cruising around 16-1700 rpm i am at 2.6 PSI boost and 19 EBP is it normal? I just wish this truck would throw a code so I can have somewhere to begin.
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S
Ok I unplugged the egr and it has power taking off now but still skips at idle and bucks in overdrive
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S
I changed my oil and filters today and after priming the fuel system i noticed that the fuel filter cap near oil filter was cracked and bubbling would air in the system cause the problems i am having? please tell me your input
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S
I had truck scanned today and it is a dead injector #5 I will post when fixed
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