Chasing a Ghost

[Cabledog]

Sorry it's P0251 is the right one that repeated

 

[Jaryd]

Have you cleaned the grounds yet. Especially the ones on the back of the passenger side engine. One of them goes to the pcm.

 

[Cabledog]

Yes all the grounds have been cleaned that I could find

 

[JayTheCPA]

No hits on the combination of all four codes. There is a hit for P0251, P0606, and P0370:

http://www.thetruckstop.us/forum/threads/p0251-p0370-and-now-p0606-all-from-wif.7141/

Possible cause is water in the fuel.

If there is no water, we can go back to looking into grounds and / or the injection pump.

 

[Cabledog]

The water in fuel light has been on for a month now and I can't seem how to get it to go out. I have taken the filter out and cleaned all of that out and now it just flickers but it was running fine with it on for a few months

 

[Cabledog]

I have zero fuel coming out of the brass T valve but it will start and idle ?????

 

[Cabledog]

Now sometimes it sputters at idle until I hit the gas pedal

 

[1994ch]

running it without fuel pressure from the lift pump means the IP is sucking fuel all the way from the tank.... that added strain on the IP will shorten its life.

 

[Will L.]

Yep, nice code menagerie. Put on the clear line.
Get ALL that old fuel out of there. Buy fuel from a different source. New fuel filter. Ensure the fuel pressure is up whwre it should be under load.

 

[Big T]

You could have two issues......something like a couple bad glowplugs or getting air in the system when shutdown causing the rough start.
Then a flaky PMD or CPS or Optic Sensor causing your loss of power / stalling.

We just went through this on my son’s ‘94 K2500 Suburban. After ruling out the PMD by swapping in several known good ones, it ended up being the OPS. Very quick and easy to replace with the right socket from Leroy Diesel.