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1987 cadillic wont idle motor control failer code

Tiny
DENNI PETERSON
  • MEMBER
  • 1987 CADILLAC ALLANTE
  • 123,000 MILES
Motor starts good runs about 2 minutes then dies code motor control fail
Thursday, March 15th, 2012 AT 1:55 AM

17 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Replace the IAC
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Thursday, March 15th, 2012 AT 2:04 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Does it restart if you u use starting fluid
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+1
Friday, March 16th, 2012 AT 1:20 AM
Tiny
DENNI PETERSON
  • MEMBER
  • 15 POSTS
What does Iac mean and how do I replace it
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Friday, March 16th, 2012 AT 4:14 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Idle Air Control IT is on the throttle body.
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Friday, March 16th, 2012 AT 4:38 PM
Tiny
DENNI PETERSON
  • MEMBER
  • 15 POSTS
Thank you very much
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Monday, March 19th, 2012 AT 1:06 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Is your car a allante?
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Monday, March 19th, 2012 AT 5:22 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Push off amd warmer buttons on the a/c panel. When u see all segmentes light release write the codes down and come back.
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Monday, March 19th, 2012 AT 5:46 PM
Tiny
DENNI PETERSON
  • MEMBER
  • 15 POSTS
It is allanta ck codes E052 ecm andb552
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Monday, March 19th, 2012 AT 11:20 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Check your battery cables for a good connection. Those codes are because your loosing battery power to the pcm and bcm computers. Not the isc
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Tuesday, March 20th, 2012 AT 1:26 AM
Tiny
DENNI PETERSON
  • MEMBER
  • 15 POSTS
Thank you again car idles 3500 rpm now I held gas pedel down to keep it running ihad to shut off key because it would not idle down
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Tuesday, March 20th, 2012 AT 4:25 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Look at the thottle youll see the idle control sesor there. Its the 1 that has a screw you losen so u can set it whyll installing. When installing a new sensor, youll need to adjust the sensor to 5volts then tighten the set screw.
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Tuesday, March 20th, 2012 AT 7:20 PM
Tiny
DENNI PETERSON
  • MEMBER
  • 15 POSTS
Thanks I will try that
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Tuesday, March 20th, 2012 AT 8:28 PM
Tiny
DENNI PETERSON
  • MEMBER
  • 15 POSTS
1987 allante code B481 after car dies
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Wednesday, March 21st, 2012 AT 8:04 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
That code is a abs fault. Nothing to do with the isc sensor. Clear the codes by using the low fan switch for no and hi for yes. It gos through the codes and stops on pcm push on low fan button untill u see clear pcm codes. Then hit the hi button. Then it will say pcm codes cleared. Do it for bcm and all other computers with codes. You need to clear all the cpus. Then recheck the codes.
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Wednesday, March 21st, 2012 AT 9:33 PM
Tiny
DENNI PETERSON
  • MEMBER
  • 15 POSTS
I replaced battery ran 10 min then it idled fine tried to drive no power
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Saturday, March 24th, 2012 AT 2:29 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Check the codes again!
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Saturday, March 24th, 2012 AT 11:18 PM
Tiny
DENNI PETERSON
  • MEMBER
  • 15 POSTS
Cadieman no fault codes on1987 allante think I ck fuel psi what should it be
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Sunday, March 25th, 2012 AT 8:39 PM

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