Truck idles rough at start up only.

[Schurkey]

9 psi because the regulator is weak is one thing.

9 psi because that's all the pump can produce is another thing.

We don't know which situation you've got.

I'm really suspicious of someone who wants to replace both the pump and the regulator.

 

[JACK34]

The thought occurs to me he may have already pinched the return line and not seen a jump in pressure, which would indicate a weak pump. But if the TBI hasn't been rebuilt it's still a good thing to do, the regulators are notorious for sucking.

I will let him know that he may already have pinched a fuel line. He likes it when I arm chair it from home. Good stuff thank you.

 

[JACK34]

9 psi because the regulator is weak is one thing.

9 psi because that's all the pump can produce is another thing.

We don't know which situation you've got.

I'm really suspicious of someone who wants to replace both the pump and the regulator.

He's a local guy I found on Craig list. He works out of his garage and is kinda new but he has a lot of business though . I will relay that to him thank you.

 

[Sabinoerc]

9 psi is still in spec, though not ideal. I would put a TPI or vortec pump in it is a mandatory upgrade IMO.

Agree. on older engines I don’t think 9psi is enough even though it’s the spec. I had 10-11psi on mine and it was still stumbling. I replaced pump and got it to 13 and problems went away.

 

[JACK34]

Agree. on older engines I don’t think 9psi is enough even though it’s the spec. I had 10-11psi on mine and it was still stumbling. I replaced pump and got it to 13 and problems went away.

Yeah well get her figured out. I got a good mechanic on it.