1999 Oldsmobile Alero missfire on #1 cly

1999 OLDSMOBILE ALERO
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DARRELL EBLING
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  • 1 POST
Engine Performance problem
1999 Oldsmobile Alero 4 cyl Front Wheel Drive Automatic

have missfire on #1 cly
Nov 4, 2009 at 7:13 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check no. 1 sparkplug, compression and injector

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Nov 4, 2009 at 9:49 AM
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