Rev Hunting On Cold Start Up (professional Opininios Please)

[cjpwrx]

Hey guys everytime i start my R33 series 2 up after about 4-5 mins the car starts to rev up and down roughly about 3-4 mm this usually stays like this till the car is completely warm after driving for like 20mins.

The mods on the car are a Greddy FMIC, Apexi Pod, Apexi cat back exhaust, Just jap dump pipe and high flow cat.

Looking for some sort of help from people that have had this problem and got it fixed or a professional i can come see to get the car look at. I live in the eastern suburbs so if someone knows a good business in that area willing to go get it checked out.

Cheers guys

Chris

[nIsMo86]

I'm curious about the cause of this problem also. My 32 (rb20) does it also on warmup.

Havent been bothered to look into it yet as it doesnt cause any performance issues.

[Adriano]

Idle issues are usually caused by dirty aac valve, the throttle body could probably do with a clean also, as could the AFM with some carby cleaner. I would also check trouble codes, and check tps adjustment.

[Bond]

Mine used to do it after warm up and it was o2 sensor!

[SLY-25T]

look in the DIY section for the cleaning AAC valve topic.

shouldnt take too long to do and its a free way to try and fix it yourself.