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The engine idles high?

Tiny
2CP-ARCHIVES
  • MEMBER
  • 1992 PLYMOUTH ACCLAIM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 78,000 MILES
1992 Plymouth Acclaim mileage: 78,000. My car idles around 1200 RPM when cold, but after a few miles on the highway it starts to idle at 2000-2500 RPM. The computer gave me fault codes about the TPS (throttle plate sensor) and the idle speed motor, I changed these two parts and the problem is still not fixed. The idle problem seems to get better when I let the engine heat up. Any ideas on this problem?
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Tuesday, November 2nd, 2010 AT 5:40 PM

1 Reply

Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
Have the throttle plate sensor or the idle speed motor checked. Also, have the oxygen and coolant temperature sensors checked.
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Tuesday, November 2nd, 2010 AT 6:27 PM

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