SR20 Backfiring Problem

[SR20PWR'D]

my sr has been having a strange backfiring problem for about a week now. when im driving down the road and i give it just a little bit of gas, it starts backfiring nonstop really quickly like a machine gun, but as soon as i give it more gas it stops backfiring. This happens at any speed and over about 3000 rpm's. Also, when it idles in my driveway, there is a little bit of white smoke coming from the exhaust and it sprays out a black liquid that stains my driveway. I have a 3" n1 dual and no cat, but its been running fine for months. Has anybody had a similar problem or knows what common causes could be?. Thanks

[asbestos]

maybe an injector is stuck open?

[einherjar]

try cleaning your mafs

[sr240mike]

Id also check timing. It sounds like a leaky (stuck open) injector though.

[s14 blacktop]

What kind of BOV do you have?

[supportTHEezln]

It you have an open atmosphere bov, when it vents it'll cause you to run rich and you'll blow up the excess gas in your exhaust, basically. especially w/o a cat, used to happen to me badly, still happens but not as loud