fast idle

1992 OLDSMOBILE CUTLASS
80,000 MILES • 6 CYL • 2WD • AUTOMATIC
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HNBROWN
  • MEMBER
  • 1 POST
olds cutlass supreme 1992 idling at 3000 rpm. changed throttle position sensor, cleaned IAC valve, what next? TP sensor made check engine light go off and temperarily idle normally, next morning back to FAST idle.
Jan 13, 2011 at 1:24 PM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Block off the throttle-body mouth, if no reaction with rpms, false air getting in there from somewhere. Take the throttle linkage loose, any effect? Take the wiring connector loose from tps, any effect? Any applicable mil codes?
Jan 13, 2011 at 1:36 PM
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