1992 Oldsmobile 88 Engine runs rough

1992 OLDSMOBILE 88
172,000 MILES • 6 CYL • FWD • AUTOMATIC
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NORRISGLASSON
  • MEMBER
  • 1 POST
I've replaced the spark plugs, wires, air filter and vacuum lines. When the engine is cold it runes great when I come to a stop sign or light, etc. But when the engine begins to warm up, it runs rough when I come to a stop, but when I take off it runes smooth through all gears and up until I come to a stop again, then it loapes and jumps (runs rough). Then sometimes it stops for a few stops, then starts again.
Mar 13, 2010 at 6:59 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Engine running rough or misfiring can be cause by the following-Inspect and test all the following listed below:
1.Defective spark plug.
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
Mar 14, 2010 at 12:23 AM
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