Engine stalls

Hey, I have a 91 240SX with the KA engine. I hadn't cranked it up since before winter, and today I went out to crank it and it would start up, but it wouldn't Idle, instead itd just stall and cut off. To get it to keep running I would have to keep giving it a lot of gas, and when I did, it wouldnt rev past 4,000 RPMs. I checked spark to all 4 cylinders and they're all getting spark. I took the fuel filter off, and it rattled when I shook it, then I blew in it and a bunch of black gunk came out the "In" side when i stopped blowing. I thought well, this isnt normal, so I replaced the fuel filter, but it still stalls and cuts off. Then, I took the air intake tube off, and at the choke, there was white smoke coming out, especially when I opened the choke plate up. Anyone have any idea what could be causing that smoke to come out? I don't think its normal is it?

maybe u have a dirty air filter clean the filter or get a new one that solved my problem once.

black gunk in the fuel filter? hrm... you should get that replaced.

I think the real problem is elsewhere, but try adjusting your IAA valve. Supposedly, it should be adjusted to an idle speed of 700 at idle.

ok, thanks. but where is the IAA valve and how do I adjust it?