1992 Oldsmobile Ciera help

1992 OLDSMOBILE CIERA
80,000 MILES • 6 CYL • FWD • AUTOMATIC
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MARKJWELCH
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  • 1 POST
while at a stop light the car shakes and acts like it wants to stall.I have changed spark plugs,wires,and fuel filter.Can anyone help me?
Sep 27, 2010 at 5:03 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Any applicable mil codes? If a spark issue, Use a digital multimeter on the plug wires, engine running. Don't get the leads caught in the fan or anything. One lead touches the wire, the other goes to ground. It's an inductive reading, you don't penetrate the insulation and don't take the plug wire loose. Say 4 of your cylinders show around .5 volts and the other two show about zero. If the two that show zero are on the same coil, could be the coil or ignition module. May not be a spark issue, how about idle air system? A vacuum leak would be more noticeable at idle than going down the highway.
Sep 28, 2010 at 12:57 PM
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