420A Pleeeaase Help Car Dies If I Shift Into Neutral

[redeclipse7782]

I have a 1997 Eclipse GS, and while driving it if i shift into neutral the car just shuts off. I just installed an sfmu, 440cc injectors, crower cams, aem cam gears, new fuel filter, fuel gauge (reads 20psi at idle) i'm running 10psi of boost. I have an safc but everything is at 0. When driving though not in neutral the car runs mint. Also when i first turn it on it doesnt want to idle unless i give it some gas for about a minute then it will idle fine. Do u think it could be my IAC>? Before i installed all this stuff it wouldnt shut off when i shifted into neutral but i did have to hold down the gas for a minute or so. It is also backfiring a little when i rev it about 4 grand and let go on the way down it backfires. But I also have a leak in my downpipe that I havent fixed yet.
Thanks In Advance,

 

[redeclipse7782]

I think its the vaccuum screw on the sfmu, its turned in all the way, i think its cutting out fuel when i let off the gas. How much psi should my fuel drop to when coasting in neutral if i at idle i am 20 should it stop at 20 when coasting?

 

[turboed420A]

try raising your idle pressure to 27-30psi, or check for vaccum problems around your throttle body and intake mani..

 

[turboed420A]

try raising your idle pressure to 27-30psi, or check for vaccum problems around your throttle body and intake mani..

the vaccum screw turned in all the way does not sound good.

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