20DETS13

Having some issues with my rb20det in my s13, starts sweet as and runs awesome when cold. but after being run for a small time it doesnt like low revs as it fouls up when you try to rev it up after being run low revs (running rich???) If you rev it right up then let it return to idle it will cut and try stall. after it does this the idle starts to fluctuate. and again trys to stall. I cleaned my AAC valve today. it made it better but it still isnt right. Any ideas how i can fix this??