I just installed my 99 spec turbos, and pfc. And it runs great except every 5 minutes or so the car will rev to 2k rpm and then drop back down to idle, in a series of quick repetitions for around 45 seconds, and then every thing goes back to normal and it holds a steady idle. It does this nuetral and while I'm driving in gear.
Please Help

 

Did you follow the procedure to let the PFC learn to control your car's idle?

 

I ran the car for 10 minutes, and then 15 minutes after that with a/c and rear defroster before I drove the car. It did "it" in the middle of that.

 

Today I could definately notice the car was doing "it" more often as the car got warmer. This really sucks.

 

There are twenty billion threads on this in the PFC forum....you need to perform the air-bleed screw adjustment that is detailed in them....and give the PFC a little time to learn as well.