Idle problems! help!
 

Alright well my 91 240sx just started acting up. When I start it up cold it starts right up. But after it's warm and I go to start it sometimes it will turn over and try and run but dies right away. Then when I take it out of gear and let off the gas it will drop to about 300 rpm and almost die. Sometimes it dies. So far I replaced the fuel filter,plugs, pressure regulater.wires and it still does it. Does anyone have any clue what it could be? thanks!

when it's cold and starts right up, what dose it idle at, and it is smooth or rough? also, have you noticed if it takes longer to start every time, even when it's cold?

it idles at about 750-1000. the idle is kinda rough. it almost feels like there is a miss but there isn't. when it's cold it will always start right up. but once warm I need to pump the gas while turning it over or it won't start.

will it accelerate fine?

Yes. I found out today after I am kinda hard on it. Like after a few drifts when I come to a stop or pop the clutch in and let the rpms drop it dies sometimes. and my A/F gauge reads that it's running leaner. also sometimes when I run a constant speed my a/f gauge is right on the bottom on the lean side..So I don't know what the hell is up! Does it help knowing that I have a Safc2 controller? I have no fiking clue on how to work it but I got one..