Is the frequency valve buzzing like an angry hornet? It is on the right side valve cover and the noise it makes is very noticeable. If it is not buzzing then check the lambda relay. Moderate failure rate. The symptoms you describe seem to indicate failure of the Lambda system. David Teitelbaum vin 10757 -- In dmcnews@xxxx, Soma576@xxxx wrote: > hello all, > > my fuel leak and fuel pump valves have been repaired, and my car starts and > stays going now. it idles well, and it surges up and down when cold just > like it should. it is still at an Amoco service station though because it's > not running quite right. > > the problem is, when you hit the accelerator about 1/2 way down, the car > shudders and skips around, then it kind of evens itself out and runs to beat > hell. that's what the guys told me it does now, anyway.