1998 Cadillac Deville UNINTENDED ACCELERATION

1998 CADILLAC DEVILLE
87,000 MILES • V8 • FWD • AUTOMATIC
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PEACHYKEEN
  • MEMBER
  • 1 POST
RPMS VARY AT IDLE AND DRIVING DOWN ROAD.HAD THROTTLE POSITIONING SENSOR REPLACED.PLUGS REPLACED.CRUISE CONTROL DISCONNECTED.IDLE AIR CONTROL VALVE REPLACED. FUEL FILTER REPLACED. ENGINE STILL RACES UNEXPECTEDLY.
Apr 24, 2009 at 5:45 PM
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FACTORYJACK
  • ✓ASE Certified Mechanic
  • 4,159 POSTS
  • ASE Certified Mechanic
It needs to be scanned to determine if the idle air control valve is being commanded open. Could be a faulty ecm, or response to a faulty input that would result in idle being commanded high.
Apr 28, 2009 at 9:59 PM
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