Engine Performance problem
1998 Mercury Mystique 6 cyl Front Wheel Drive Automatic 128000 miles
We will drive the car for around a 10 mile drive and when we are coming back on the highway it will start to buck like crazy. It will keep constantly doing it over and over again. Its almost like a hard slamming hesitation. We have no check engine light on although we did a while back which eventually turned off. Also noticed that the rpms will fluctuate up and down from 1500 and 2000 and will eventually settle at 1000. I tried cleaning the maf sensor with cleaner and it seems to help prevent it most of the time. Now it does it less often than before, but the car still has fluctuating rpms at start up. Lot of people are saying it could be a catalyctic converter, but wouldn't the check engine like come on? Also heard it could be a fuel pump issue.
Also we took it to the place we bought the used car and they were saying they could try a transmission flush, which I was skeptical about.
have the same problem?
Wednesday, September 29th, 2010 AT 1:24 PM