Oh boy things go from back to worse......I let me mechanic do the tune up and vavle cover....the price hurt me but I wanted my car back......so I go to pick the car up and no more than 2 blocks away the car starts putting. The car putts at very low speeds, under 20mph...also putts when I am at a complete stop.....I take the car back to him this morning, and I am *BLEEP*ed cause I just paid the mechanic $700 + to fix the car, and I know he is going to call me back and tell me the heads are warped..........I specifically asked him when I took the car there is head warping could be the problem, since the car had recently overheated. But he said noooooooo......so I think now that he misdiagnoised it, he should fix the problem for free.