1988 K5

[ATCFLYBOY02]

I need to know something... ok If I run a regulator on my truck and run it at 7 lbs w/ no return line the pump acts like its going out. But on the other hand... I have run a return line with and without a regulator and its not getting but 2 lbs either way... suggestions?

Doc

 

[ATCFLYBOY02]

Nothing?

 

[jt512]

what do you mean by " the pump sounds like it's going out" ?

 

[ATCFLYBOY02]

It starts pulsing like its going in and out...

 

[jt512]

does it sound like that when the truck is running or just when you turn on the pump with the engine off. also is it a carbed engine or injected. you may want to edit your post title with more description of your problem to get more replies. ex-fuel pump question on 88 k5