I know that alot of people with honda's have this problem, when the car is run hard the revs bounce in idle. I just replaced everything that I could think of and something worked, I don't quite know what. I have a feeling that it was the TPS. But I still have this problem, in idle my RPMs drop mad low. I mean that the steering wheel will vibrate and the car shudders and sometimes will shutoff all together. I put a red top in there that helped some, any sugguestions?