Originally Posted by
SGTSR20 Really! Well mine is not a issue, its only that when the compressor kicks in the idle jumps but quickly settles back down to its original rpms, with a 3 inch exhaust its noticeable at a red light. If yours doesnt fluctuate at all then then maybe I have a bad sensor, but even on all stock cars the compressor powering surge its noticeable.
How high up is it jumping? A couple hundred RPM is normal, and I could see it being very noticeable with a loud exhaust. I had a very quiet 2.5" system on my VE.