Bad idle sr20det some smoke aswell

[Maikoool]

Hey I own a 180sx equipped with a red top sr20det, some mods are s14 turbo, walbro fuel pump, fmic, exhaust . When driving it's fine but when I'm coming to a stop at the lights my idle bounces, as in it drops real low then goes back to normal. When I boost it hard or drift it then come to a stop it's worst, sometimes it actually stalls. And sometimes it start idling rough, car shakes abit n black smoke comes out. Anyone know what the problem can be?

[Patarach]

I would check the MAF first its a pretty typical problem and would cause some of the problems you described and it fairly easy to test with a multimeter / voltmeter.