hencethealec

So I've been noticing this for a while, but it seems to be getting worse. What happens is when the car gets warmed up, and as I am coming to a stop, when I take it out of gear or push the clutch in, the car revs up to 4-5k RPMS for a few seconds and then slowly comes down to idle. It might not be a big deal but it is definitely wasting my gas! The car is stock except a true dual conversion and the Diablosport Predator tune. Any ideas? Thanks in advance!

orangecrush24

I would lean towards a bad IAC but I'm not sure if thats a good diagnoses given this only happens when it does...others could speak to that I'm sure