'93 Allante stalls at idle with a\c

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
Cadillac Allante Forum Discussion, '93 Allante stalls at idle with a\c in Past Cadillac Vehicle Discussion; 1993 Allante with Northstar, of course. Engine stalls when car is in drive (with brake engaged) and a\c is on. ...
  1. #1
    drivestregis is offline Cadillac Owners Member
    Join Date
    Jul 2004

    '93 Allante stalls at idle with a\c

    1993 Allante with Northstar, of course. Engine stalls when car is in drive (with brake engaged) and a\c is on. I have changed idle control motor. Mechanic says no codes are coming up and can't figure out cause.

  2. Remove Advertisements

  3. #2
    BeelzeBob's Avatar
    BeelzeBob is offline I'm a Cadillac Fanatic!
    Join Date
    Dec 2002
    Fort Lauderdale, Florida

    Re: '93 Allante stalls at idle with a\c

    Is the idle speed control motor working and adjusted properly??

    To do a quick check open the hood with the engine idling in park with the AC off. Hold the throttle open slightly with your hand on the throttle lever so as to elevate the engine RPM to 2000-3000 or so.... Simultaneously depress the plunger of the idle speed control motor with your finger......it should start retracting. Allow it to fully retract until it stops. "Trap" it or "freeze" it there by disconnecting the wire connector at the idle speed control motor. Slowly return the throttle lever to the closed bore idle position...i.e..release it onto the fixed stop on the other side of the throttle body. The engine should barely idle at about 450-500 RPM. If it repeatedly stalls or just will not idle then possibly the throttle body needs to be cleaned and/or the closed bore air rate adjusted. When the throttle is at the closed bore position there should be about .030 to .060 inch clearance between the throttle lever and the plunger of the idle speed control motor. There absolutely must be clearance between the idle speed motor plunger and the throttle lever...but not too much.

    Does the AC work OK...????...i.e....are you sure the AC compressor isn't seized and stalling the engine when the AC is turned on...??? Elevate the RPM and turn on the AC so that the engine does not stall and see if the compressor is turning and quiet.

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts