for some reason if i try to hold the idle at like 3000 rpm with the clutch in...every few seconds it drops to 2000 then back to 3000....almost like a rev control or somethin....any ideas???
This is a 99 civic si with a vortech supercharger by the way
This started happening after i did the vafc hack

 

I had the same problem after I switched to the hack. I never really figured out why it was happening though.

 

I can rev above 4000 with no problems.....is it the same with you?