Engine Performance problem
1996 Oldsmobile Aurora V8 Front Wheel Drive Automatic 159000 miles
I recently had a flashing check engine light and had codes for RANDOM MISFIRE, CYLINDER 5 MISFIRE, AND LOW VOLTAGE O2 SENSOR. I REPLACED THE PLUGS AND WIRES, CLEARED CODES AND THEN JUST HAD A CYLINDER 5 MISFIRE CODE COME BACK. I replaced the coil pack and now the same CYLINDER 5 MISFIRE code is back and now flashing just occasionally. I can feel the misfire more at idle and when engine is cold, but smooths out when warm and at highway speeds. I am lost. Please help! (4.0L V8 baby northstar, as you already know) Thanks.
Thursday, January 14th, 2010 AT 12:37 AM