Question about 1989 Cadillac Sedan DeVille

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1989 Cadillac Sedan DeVille

The Car Air conditioners only throws airs thru the floor vents and its always in economy. How can i fix this???

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Disconnect battery negative cable from battery and touch it to the positive sidefor a second and hook it back up , this may reset the bcm.

Posted on Jun 20, 2010

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Can you run 89 cadillac deville without air pump


I am not a Cady expert. In my experience, you can probably run an engine with out the air pump ... but why would you? The air pump reduces emmissions and improves performance. Removing the pump will also require reconfiguring the belt scheme.

Best solution is fix the pump.

Thanks for visiting FixYa.com today

Apr 10, 2012 | 1989 Cadillac Sedan DeVille

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No heat


even after car warms up is there no heat is there any air at all comeing out of vents rather it be hot or cold reason i ask theses questions is to solve your problem

Dec 12, 2010 | 1989 Cadillac Sedan DeVille

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The service air conditioner light on our 1991 Cadillac sedan deville 4.9 comes on when I turn the air conditioner on. The electronic climate control will not let me turn on the heat or the ac. It just...


prob a low charge easy to do get R134a from parts store with hose start with about half a can and check it make sure ac is on max when you charge it light should go off

Oct 02, 2010 | 1991 Cadillac DeVille

1 Answer

1989 Cadillac Sedan De Ville engine stalls when air is turned on...tries to take off when stopped at stoplight..sometimes dies while driving..


It sounds like the idle compensation circuit for the engine is dirty or faulty. Have your car checked at a shop. have them check the idle air motor for dirt or malfunction. It could be that it only needs to be cleaned or replaced.

The compensation circuit adjusts the idle/slow speed of the engine. The air conditioner puts a load on the engine and this circuit adjusts the engine speed to compensate. Also, when the car is cold this circuit adjusts the idle speed to prevent stalling and help the engine warm up faster. I hope this information helps you.

Aug 16, 2010 | 1989 Cadillac Sedan DeVille

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Find free online repair manual for 1989 cadillac deville


i have a 1989 cadillac deville 2 door front wheel drive i just changed the fuel filter in it and i pour fuel injection cleaner in the gas tank. when i pour gas in the carberator it gives a little start to the car and it started the car but it wont stay on. i just bought a new battery for it but i havent tried it out yet just because the positive wire going to the battery was bad so i cut the wire and gonna put a new wire for it do you have any suggestions what is wrong with it. it has been sitting for a couple years.......and it does start it just turns over......

Aug 29, 2009 | 1989 Cadillac Sedan DeVille

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Air blend doors do not work. Air blows from defroster vents


check or loss of vacuum to mode control switch in dash ac control. these are not blend doors, they are air flow control, a blend door controls the air temperature not where it comes out.

Aug 14, 2009 | 2001 Cadillac DeVille

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Engine running hot displays on dash....cold air blowing thru vent


there,s a chance that your hot-cold air trap is not working

Feb 22, 2009 | 1995 Cadillac DeVille

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