My 96 PSD quit on me the other night, I changed the fuel filter and it was full of crap. I cleaned it all up the best I could then it started right up and ran fine for for about 15 min. it was idiling and it just died. I started it back up and it would run but sounded and felt like it was running on about4 or 5 cyl. It died again and I had to wait about 15 min. for it to start so I could pull it back into the shop it was running fine then, so I checked fuel pressure with gauge it pegged a 50 lb. gauge about this time it died again so I pulled out the filter and the can was full of fuel and it looked clean. It would not restart so I had to let it set.
Does anybody have any ideas where to look for my problem? It dies just like you shut the key off, I am thinking something is shutting down the fuel to injectors maybe or that power is cut off to injectors?
Thanks RB

the truck had been setting for at least 5 or 6 weeks

 

Clean out the FPR (fuel pressure regulator). There is a screen in there that gets clogged up and won't flow fuel (or air). Pull the filter out and there is a 1/4" hole on the driver side of the bowl. Cut or pull the cotton off a q-tip and use it to scrape the crud out of that hole. If you're really feeling ambitious pull the whole FPR assembly off the side of the bowl (just two bolts), remove the screen completely and give it a thorough cleaning that way.

BTW, the fuel pressure with the engine running should be in the neighborhood of 65-70 PSI.

Try that first, and we can go from there.

 

Thanks I will try the fpr first. I grabbed the wrong gauge to test pressure it normally was about 60 to 65 psi.
RB

 

If you pull the FPR be careful with the o-ring there, and there is a little plastic ball behind the plastic cylinder that holds the screen, or they can fell in the valley of dead and youll never find them.

 

I pulled the FPR and cleaned it out, the screen was completly stopped up. I was hopeful that was the problem but I also know how my luck runs. I put it back together and it fired right up I backed it out of my shop and it ran and idled perfect for 5 min. [ I watched the clock ] Then it died and would not restart. I let it set for about an hour went back and it fired right up. Dezjavu all over again. I'm thinkin it has to be in the wiring to the injectors or the injectors themselves?

 

IPR oring's or the ipr itself. Mine is hard to start when hot. Almost impossible. As soon as my new IPR come's in I'll post up some results.

 

Could be CPS... also check the injector harness connectors on each valve cover for burnt pins and make sure they're plugged in all the way.

 

Where has it been sitting for the last 5 or 6 weeks? Has it been raining much or are there any mice / squirrels, cats nearby?

 

Cats ? ....

 

I agree , the o rings are a cheap test ...

 

Ball of string, strands of wire, what's the difference?

I know it's not 107 deg. everywhere, and cats do tend to wander around and nap in some strange places. Cats are usually more of a cooler weather issue, but I try to keep my mind open.

 

i had a cat decide to die in my fan shroud in my first idi during katrina, i only fornd it because he was so stiff my fan couldnt spin and the truck overheated. ill spare the weak on how we got it out

 

I was thinking hair ***** ...
















JK Chris

 

Defiantly check what Evan said. Mine started running funny missing and loping and it ended up being one of the vc plugs the ground and the injector wires would contact every once in a while because they pulled out.

 

Mine kept dying a while back because the IPR plug kept coming unplugged. Needed a new pigtail.