1985 Cadillac EL Dorado Engine

Tiny
THOMAS REVELL
  • MEMBER
  • 1985 CADILLAC ELDORADO
  • V8
  • FWD
  • AUTOMATIC
  • 61,000 MILES
At times my car revs up and down at a light, after I start it or when it is in park. But still mostly rides very well, what is my problem?
Saturday, November 8th, 2008 AT 8:32 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Hi:
Most likely it's the Idle Air Control unit (IAC), or the throttle positioning sensor (TPS). Take it to a nationally recognized auto parts store and have them scan it for codes. Most stores will do it for free, and if there is a stored code, you'll know for sure what to replace.

Joe
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Tuesday, November 18th, 2008 AT 10:37 AM

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