I have a 85 iroc that was a tpi car. WHen i bought it, it had no motor. So i put in a carbed 350. I bought a new fuel injected intank pump and ran that to a mallary 3 port regulator at 5psi. The problem iam having is that it will bounce from 4 to almost 9psi. And sometimes when you give it alot of throttle it will almost drop to 0 psi. Sometimes you can even hear the pump thumping. Could the pump be bad or is there another problem somewhere.
Thanks Mike