Ok, just to let you know, the fuel injectors are clean, the throttle body is clean, I use good gas, and its not missfiring. It has 58,000 babied miles on it.(off coarse I get on it now and then, I do have an intake and exhaust on it after all . It has never done it before. I turn it on, and after its warmed up at idle it just goes up and down, up and down. Like a looping effect. You could see it in the tach too. Its very slight , but seems to be getting worse. A freind of mine said it needs an idle re-learn. What say all of you.......any help would be greatly appreciated.