305 tpi s/d 5 spd
a few months back I replaced my injectors with a set from south bay. I also switched out the regulator for an adjustable. recently I have had issue at cold start up. it seemed like not enough or too much gas. no smell of gas.

I have about 30 psi when the pump primes at ignition. then it sits at 10 psi. after start and running pressure is at 38-40 psi. turn it off pressure is back at 10 psi. the regulator screw is all the way out. no ses, vac leaks.

until its warmed up, there is a hesitation in the area of 2k rpm. shift up or below it its fine .i get a popping sound inside the intake a bit.

which way opens up more pressure on the regulator? screw in or out? and any suggestions to resolve this?

 

Tightening the screw increases the pressure. Sounds like there is a defect in the diaphragm metal stop. a you maybe able to polish the piece so it seals on the regulator body insert.

 

I had tightened it down and didn't see any increase or decrease of pressure. doesn't look like theres any leaks. ill try that

 

If you look close at this one you can see were it is making good contact.