fuel pressure problems on a 02 silverado

[_Dylan_]

I'm trying to help my Dad out this christmas. I put a new cabin filter in it. 260k on the original! I also put a new tail gate handle on it and did the 4-high mod for him as well.

Anyways, it's a 02 silverado with a 4.8. He is having problems with hard starts. It almost never starts on the first crank unless it was just turned off. He has to turn the key on a few times to prime and pressurize the system. If he does that it starts just fine.

So obviously the system is loosing pressure. The fuel pump was replaced a couple years ago. I replaced the fuel pressure regulator a little while before that.

I stopped by the junkyard today and grabbed a used regulator but that didn't make a difference.

Any tips? He has had this problem for at least 100k miles and I feel bad about not being able to fix it for him.

 

[Rivieraracing]

Do you know what brand of pump he went with the last time it was replaced? Does he keep his tank above half full most of the time?

 

[_Dylan_]

Do you know what brand of pump he went with the last time it was replaced? Does he keep his tank above half full most of the time?

No I don't. I wouldn't expect him to know either. He had it replaced in a barn on a Thanksgiving weekend 700 miles from home by some guys that the tow truck driver knew.
I would imagine it's an auto parts store special. Airtex or some other ****** brand.

And no the truck almost never has more than a half tank in it, but the hard start problem IIRC wasn't fixed when the new pump went in.

I was reading that the check valve on the pump could be bad, but that means buying a whole new pump assembly...