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Any heard of a "idle learn" procedure for 92 olds Cutlass 3.1?

Tiny
BUS933S
  • MEMBER
  • 1992 OLDSMOBILE CUTLASS
  • 330,000 MILES
92 olds cutlass supreme. Replaced ECM, made sure numbers matched, used original prom. Car starts but surges at idles from 500-1500 rpm. Dangerous to put it in gear as the brakes feel hard and car lurches forward. Can rev to over 2000 and it smoothes out sounds great. But pressing gas pedal between surge speed and getting to 2000 rpm feels like no response - the pedal presses down but there is no response until 1/3 to the floor then it jumps to 2000+rpm and smoothes out.
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Saturday, September 15th, 2012 AT 7:54 PM

6 Replies

Tiny
BUS933S
  • MEMBER
  • 43 POSTS
BTW, the car ran fine until the ignition control module went out. Probably didnt need to replace ecm but did anyway out of frustration for diagnosing issue. Replaced ICM and that fixed the no-start problem. Nothing else has changed.
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Saturday, September 15th, 2012 AT 7:56 PM
Tiny
BUS933S
  • MEMBER
  • 43 POSTS
Oh yeah, and the service engine light is on at idle, but once I hold it over 2000 rpm for several seconds the light goes out, until I let it idle again.
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Saturday, September 15th, 2012 AT 7:59 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like more of the idle air control motor.
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Saturday, September 15th, 2012 AT 8:23 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Get the trouble codes and let us know what it is.
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Sunday, September 16th, 2012 AT 7:33 AM
Tiny
BUS933S
  • MEMBER
  • 43 POSTS
Thanks for the reply but after some serious snooping I found a vacuum line disconnected. Runs fine now.
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Sunday, September 16th, 2012 AT 2:03 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Glad to know it is an easy fix.

Have a nice day.
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Sunday, September 16th, 2012 AT 4:44 PM

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