rough running

solrizzo · #1 12-28-2003, 01:57 PM

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??

solrizzo · #2 12-30-2003, 02:54 PM

anyone?

Rob_0126 · #3 01-07-2004, 05:46 PM

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

Robert

pdonis · #4 02-10-2004, 10:16 PM

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?

Rob_0126 · #5 02-11-2004, 03:27 PM

Quote:

Originally Posted by pdonis

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

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