12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

1500-2000 RPM Sputter/Pop

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  #1  
Old 03-16-2014, 10:14 PM
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Sad 1500-2000 RPM Sputter/Pop

Ok so my truck now randomly starts to act up,like it has a mind of it own!So i lest to go get some dinner and truck ran fine going to dinner!Before i left let her warm up for about 10 min then had about a 7 mile drive to my first stop,shut the truck off went into the store for about 15 min came out started right up,second stop same started great ran smooth!Was going threw the drive threw and noticed white smoke coming out the pipe,sat at idle for 10 min went to pull out on the street and mashed on it and she hit 2000 rpms and popped and sputtered!So kept driving started to go up a grade and she would on shift to 2nd and hit 1800-2000 and sputter!And if i let off the pedal she would die or drop down to 550-600 rpms!Finally made it home!!15 min drive turned into a 45 min drive!HELP ME!!
 
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Old 03-16-2014, 10:48 PM
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What's the fuel pressure look like between the lift pump and the IP? If you've got good pressure, I'd start looking into your timing.
 

Last edited by the.beard; 03-16-2014 at 10:50 PM.
  #3  
Old 03-16-2014, 10:52 PM
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I have no clue but it randomly does it?I looked at the lift pump i just replaced and it looks like the little hose between the lift pump and pre-filter is cinked a little bit?Also looks like a White cloud pours out my pipe when it does this too!
 

Last edited by 12vcumminspower7; 03-16-2014 at 11:15 PM.
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Old 03-17-2014, 03:02 PM
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X2 on the timing bro.
 
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Old 03-17-2014, 03:33 PM
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Ya did some more looking around and could my injectors be bad at 200k miles?But i was going to do my timing anyways but how come its random?
 
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Old 03-17-2014, 04:00 PM
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Originally Posted by 12vcumminspower7
Ya did some more looking around and could my injectors be bad at 200k miles?But i was going to do my timing anyways but how come its random?
It happens, dude.
 
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Old 03-17-2014, 08:11 PM
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timing just slips sometimes too ... i am planning to use some loctite on mine when i get to that point in the re-building process ... its for slip fit shafts and stuff like that ...

LoctiteŽ 609

Oughtta do the trick ... I'm going to call them and reserch this as a possibility ... dont want this "slippin" happinin to me ...
 
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Old 03-17-2014, 08:21 PM
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Originally Posted by 4x4manonbroke
timing just slips sometimes too ... i am planning to use some loctite on mine when i get to that point in the re-building process ... its for slip fit shafts and stuff like that ...

LoctiteŽ 609

Oughtta do the trick ... I'm going to call them and reserch this as a possibility ... dont want this "slippin" happinin to me ...
Never had it happen to me *knock in wood* but I've heard of folks that couldn't get it to stay with any other method using lapping compound working the gear on the pump back and fourth, clean and reinstall.

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Old 03-18-2014, 05:11 AM
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when was the last time you put a fuel filter on it?
 
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Old 03-18-2014, 11:40 AM
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Originally Posted by turbo2332
when was the last time you put a fuel filter on it?
I have had two brand new fuel filters in it in the last 100-150 miles
 


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