Inspect the plug that connects to the frequency valve. Pull the plug, and verify that the connectors have not been pulled back up into the plug (it can happen if the plug is disconnected by pulling on the wires rather than the plug itself). Had the same symptom on my car once. Turned out to be an intermidant connection on the frequency valve. -Robert vin 6585 --- In dmcnews@xxxx, Joe Palatinus <jpalatinus@xxxx> wrote: > While driving I occasionally get a jerking, or jolting, or not smooth > accelerating. I feels like its not getting gas, and then I press on the > gas and it goes rapidly, or accelerates very rough. It is almost like a > bad rpm rlay, but I borrowed the relay from another car, and I get the same > problem. I am still getting about 13-15 mpg, so I am thinking that these > problems may have something to do with each other. any idea or advice? > Joe Palatinus > VIN 17167 > +6808