Ever since I got a clutch installed I have been having this odd surge issue.

If I am cruising in neutral, the idle surges 1000-1500-1000-15000 over & over again. When I come to a complete stop, the idle stabilizes & there are no problems at all. It only happens while i am moving in N. It doesn't matter if I push the clutch pedal in or not while I am moving.

Tune did not change & parts did not change (other than the clutch). Doesn't matter what temp it is outside & there are no boost leaks. (recently blt'ed)

Clutch is a Exedy twin HD...

Figured that I would throw this out there to see if anyone has any ideas.

 

could be that the clutch is not totally disengaging all the way. I know that on my 11 when its cold and I"m backing up the second I let go it jumps to 1500 and then comes back down. This is on a stock clutch.

 

yeah i suppose it's possible. It idles fine when I am stopped. It really doesn't bother me too much. I just found it quite odd. I noticed that when I was on the stock clutch it would do the same thing sometimes. With the exedy twin in there it does it all of the time. Wonder if any other exedy twin owners have this problem.

 

do you have the magnus cmc kit? if so you can try adjusting the pedal...

 

I do have the magnus kit. I could definitely give that a try. Thanks for the suggestion.

 

Let the cleaner soak awhile, repeat as needed, then reinstall the IAC valve, start the engine and run it at 1,500 to 2,000 rpm as before until no white smoke is seen in the exahust.