If its not like the vaccume is basicly helping to suck the fuel from the injector than I just dont understand what your talking about.
But you know way more than I do and I value your advice. So I...

Ok, I think I understand what your saying now. So basicly its like a siphon or suction effect, where the higher vaccume of the engine at low load is actually kinda helping to suck the fuel out of the...

Umm....delta pressure differential? What is that?
The tbi doenst use a vaccume refrence, and the ecm varies the injector pulses to compensate for low load and high load. Does it not do the same...

What is the fuel pressure with the vaccume line unhooked from the fuel pressure regulator? I tried googleing it and I find everything from 39 up to 45, and then some saying anything between 40 and 47...