I have a 1999 Tahoe LT with a 5.7L engine. It only has 44,000 miles since it was in storage for about 18 years before we got it.

I've been having intermittent issues with it starting. It seems like a fuel issue because the engine will crank but not start. I can prime the pump by turning the ignition to the on position a few times and then it will start right up and run fine. I put a pressure gauge on it and found intermittent low pressure, but it always held pressure, so I swapped out the fuel pump. That hasn't fixed the problem. In fact, this is the second pump I've put on. I replaced the original one because it was making a squealing noise.

My next thought is that it could be the fuel pressure regulator, but that looks like a pain to change, so I thought I'd get some other opinions from y'all. Is there anything else I should check before going this route? And if I do dive into the manifold to change the regulator, is there anything else there that I might think about changing on this 21 year old truck?

Thanks for your help.

Dan

 

I had to change the inside the intake manifold spider injector system on my old '99 Yukon 5.7 . Seems there was a updated system when I did it 15 yrs ago as OEM original system had issues, going by old memory on that.