when my saturn sits or idles it omits black sooty residue out the exhaust, also the check engine light comes intermittly. I have changed the head gasket, plugs, oxygen sensor, pcv valve. It clears up when you drive the car, but once you idle, or shut the car off and dont start for sometime it starts all over again. the exhaust fumes smell fuel rich. Does anyone have any ideas?
- posted
19 years ago