Contour GL 1995 133000 miles,
4 Cylinders 122 3 2.0L SFI DOHC
tune up a month ago, tranny fluid changed one week ago.

The car rans good at the beginning, even over 60 mph. After about 20 mins' driving, the engine warmed up, when speed over 40 mph, the car begain surge like slip in tranny. You also can hear the thump. When pushing the gas pedal, the Gas rushed out more than the normal.

When open the hood, I heard the periodic sound like leaking from the engine.

What's wrong with my car?

The PCV valve is bad? or ...

Last edited by renyj1973; 08/18/06 04:01 AM.