5.3 silverado won't idle

[Harmonator]

My 2000 chevey truck with 5.3 won't idle and is hard starting. I checked the fuel pressure regulator vac hose and no fuel came out....was sure that was it but not sure now. Help please.

[CaptainMusky]

fuel pressure regulator would have been first guess, next would be fuel pump. Do you hear a buzzing sound coming from near the gas filler when you turn the key on? If not, I think you fuel pump could be the culprit. Fuel filter wouldnt be a bad think to replace too and if your fuel pump is bad you should do both at the same time.

[Harmonator]

Yes, I here the fuel pump, it sounds normal.

[CaptainMusky]

Yes, I here the fuel pump, it sounds normal.

Then not sure, but thinking that your pressure regulator could still be bad.

My wife's just went out in her trailblazer and that thing would either not start, start very hard or idle really bad. Similar to what you are experiencing.

I had it done so not too sure on the procedure myself or just the cost of the part, maybe it would be worth a try to swap it out?

Otherwise not sure what you have there.

[Jeremy airjer W]

Intake plenum gaskets?

How long has the check engine light been on?

Does it get better after it warms up?

[Harmonator]

It never did have a check engine light on, and did not matter if it was cold or warm......the good news is that I just went out and bought the fuel pressure regulator valve and replaced it.......FIXED!!!!! It runs perfect again. $83 dollars and 5 minutes of work in the garage. Thanks for the input fellas.

[CaptainMusky]

It never did have a check engine light on, and did not matter if it was cold or warm......the good news is that I just went out and bought the fuel pressure regulator valve and replaced it.......FIXED!!!!! It runs perfect again. $83 dollars and 5 minutes of work in the garage. Thanks for the input fellas.

Saweeeet!

Glad it was an easy and simple fix for ya!

I think mine is going bad too. There is some erratic idling every now and again. I should just do it and be done with it even if that isnt the problem I am sure it will go bad soon.