So I swapped a 5.3l into a 98gmc, and i cant get it to cold start. If i squirt fuel into the intake, until the engine warms up, it runs fine- i can shut it off and start it up again no problem. But if i let it sit till its at room temp it wont run. It also wont run, even if the engine is warm, if my iat is hooked up. I have the maf removed for sd tune. I wasnt pushing boost yet(have the tubing disconnected before the tb- has the iat and bov on it). Any ideas as to what could cause this issue?
it has 60lb/hr injectors, tu1 cam, 2bar map, aeromotive 340 stealth- if you need more just as.