Question about 1991 Plymouth Acclaim

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We have a 91 Plymouth Acclaim 6 cyl. The car runs well when at speed but it randomly stalls out at idle. It will also stall randomly when slowing down to stop in traffic. Any ideas what it might be?

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  • Plymouth Master
  • 6,674 Answers

Remove the A.I.S motor and give it a good cleaning (especially the pintle -pointed end ) with throttle body spray cleaner, as well as the port you remove it from, then re-install and try it. That will usually cure it, and if it starts to happen again, replace the A.I.S. motor. Doesn't hurt to give throttle plate and area a spray while your at it.We have a 91 Plymouth - fd70c70.gif

Posted on Oct 12, 2010

  • smtlc Oct 14, 2010

    Ok - I got all the parts identified now how do I remove the AIS? (If you gather I am a novice at this stuff you are right - but right now I can't afford to pay the shop to fix this). Thank you for your help!

  • Mike Butler
    Mike Butler Oct 15, 2010

    Remove electrical connector obviously, then remove the 2 (usually ) torx head screws, and wiggle it out of the hole. Pay attention to how it was lined up for re-install. Careful not to lose small "O" ring. Clean it as described, and rub a little vaseline or clear type grease around "O" ring area and re-insert it after cleaning hole out with spray as well.

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1 Answer

How do I fix a stalling problem in a 1995 plymouth acclaim?


check spark at each end of spark plug pull every one and see if one is weak or not fireing could that could tell you if you have a bad coil clean cap and rotor contacts with light sand paper or wire brush check for moistor in cap... this will kill them dead in there tracks might just need a new rubber gasket for cap make sure you dry out and clean contacks first be for using again good luck

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This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

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1 Answer

My son's 92 Plymouth Acclaim, occasionally sputters when approaching a stop & stalls when completely stopped. A previous owner set the idle speed pretty high apparently to try to correct. ...


Hello -- It could be what's called an IAC (idle air control valve) -- if it is acting up while running vehicle prior to operating temperature.The speed sensor would be more in tune with making the speedometer read how fast you are traveling. You could check the haynes or chiltons repair manual at your local library - call ahead to be sure of availability, alternatively most auto parts store have them for like $20 - again call ahead for availability.
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Ck
Please provide feedback

Oct 03, 2011 | 1992 Plymouth Acclaim

1 Answer

I have a 1994 acclaim with a v6 it will stall when coming to a stop or just at idle in park


Try removing the idle air control motor (IAC, or AIS ) Automatic idle speed motor, same thing.Spray the pintle (pointed part) and port it was removed from with throttle body spray cleaner until clean and re-install and try it. Don't push or pull on shaft or pintle, just clean it and re-install as it was. If it works for a while then starts to do it again, replace it.

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1991 plymouth acclaim 3.0l v6 mitsubishi engine approx. 78,000 miles. sometimes but not all the time the engine will cut off when you come to a stop. it will crank up but will stall when stopping again,...


I'd pull the AIS motor ( automatic idle speed ) of side of throttle body and give it and the port it comes out of a good spray of throttle body cleaner, especially the Pintle ( pointed part) and re-install it and try it. If it cures it great, and if it starts to act up again a while down the road, replace it. Also referred to as IAC sometimes.( automatic idle control)

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One suggestion:
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Info:
Some of the classic symptoms, stalling at dead stops. failure to auto lock doors. poor fuel economy. Failure to go to overdrive.


Recommendation:
Go to your local parts store and run the failure codes.

Shop notes:
Your ECU thinks that the engine is running with out moving, During slow down the engine steps down the idle to match ground speed and as a result the engine will not stall. At present it goes directly to idle and stalls due to drag on motor.
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R/
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