this is a 92 cutlass cierra -V6.drove about 100 miles last night.all of a sudden its starts running a little rough.the idle is noticably rough too.the engine light is NOT on.the plug wires are all on and looked ok.any ideas??maybe a fuel injector??

anyone?

Guessing, I would say maybe, catalytic convertor clogging up, or O2 sensor bad.

Robert

My '89 Supreme 2.8 L had a bad 02 sensor and it ran better than after I fixed it. I don't think a bad 02 sensor would cause what's described. Any codes? Access to a scanner?

My '89 Supreme 2.8 L had a bad 02 sensor and it ran better than after I fixed it. I don't think a bad 02 sensor would cause what's described. Any codes? Access to a scanner?

A Bad O2 sensor causes the engine to run rich. I would imagine since your engine was running rich for a long time, once it was working correctly, and leaned back to where it should be, it probably caused problems.

Solution? Seafoam :)


Robert