1994 Cadillac Deville
Has climate control. When you turn on the a/c, the compressor only runs for about 5 seconds at a time, a little cool air comes out of the vents. I put a guage on the low side to see if it needed a charge, it reads in the red about 100, when the compressor comes on it drops down to the yellow about 55.
I had same problem, I took it to a shop, they said it was overcharged by twice the amount that it needed, so they sucked out all of it, and put the proper fresh amount back in. They said if i would have left it, that the compressor would have exploded, and ruined everything internally to the A/C system,
They also were troubleshooting my wiring for the short cold cycles, and after the first hourly rate of $95, I paid and left. But then I noticed they had it set at 65* but when I turned the electronic temp up to 70* it blew cold. So try turning up the temp a little bit to find what works for you with the A/C running to get it to blow cold.
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Oct 20, 2010 - Uploaded by 1969Bossman429
We dropped our 2000 Cadillac DeVille DTS off at the local Cadillac ... He got into the vehicle, turned the key and the vehicle was still revving at full throttle. ... He raised the hood, reached in to the throttle body area and cycled ...Missing: 1994 chatter activated
Jan 17, 2005 - For my Review I will write about the 1994 Sedan Deville. ... A stifferbody this year made the Deville much quieter over the outgoing 1993 DeVille. ... First is a key when your looking at just about any Cadillac, push "off" and "warmer", this ...Have a helper hold the throttle plates wide open with the engine off.
CarGurusJan 21, 2014 - Cadillac Deville 2001 won't start, engine won't turn over - My cadillac won't start. When i turn the key the engine wont turn over and when i do turn the. ... bad replace was told alt was intermenting so that's wat caused issue now car .... intake plenum (the tube between the Mass Air Flow and the throttle body).Missing: 1994 chatter activated
Fuses 6-7-8-9 are powered from the ignition key switch. Fuse 4 is powered from the RAP relay number 2 in the relay box. RAP is for retained accessory power - its the relay that keeps power going to the radio and things after you turn the key off and before you open the door.
If you want to charge the system and the system was low on freon, it may have automatically shut the compressor down.
Sometimes, the computer will do this as a safety measure, and it must be reset.
On my 1990 Deville, resetting the computer is as easy as disconnecting the battery for a few minutes and reconnecting and making sure that as soon as your a/c compressor starts cycling to add some refrigerant, about .5 lbs. at least.
Otherwise, the compressor will not get current from the computer's relay.
You just need to go through a simple Idle Relearn Process.
The Idle Speed Control motor will cause the accelerator pedal to tap and the car will surge back and forth, actually acting like there is a lack of power during intial startup.
Whenever a battery is changed, went dead or the ECM computer is replaced. In order to make the engine run normal again, you need to take the car through a relearn process. Otherwise the idle could be very slow or have a 30mph idle. To enable it to relearn, here's what to do. 1) Disconnect the battery cable for 15 minutes, before hooking it back up. 2) (KOEO) Turn the Key On with Engine Off, just so the electronics are on, but without starting the engine and turn the climate control panel to off. 3) Push the off and warmer buttons on the climate control panel at the same time and hold for up to 5 seconds for the computer to go into diagnostics.
On the fuel panel screen it will display 888 then E52 and then 70.
When it gets to 7.0 shut off the key for 1 minute. 4) Repeat step 3, two more times. 5) Start the engine without pushing on the accelerator pedal and let it run for 18 minutes with the climate control panel off. 6) After 18 minutes put your foot on the brake and shift into drive and wait 1 minute. 7) Then turn on the a/c by pushing the auto button. It needs to be warmer than 60 degrees F so the compressor can engage. Wait 1 more minute. 8) Put the shifter back in park and turn the key off. 9) Wait 1 minute 10) Idle relearn is now complete and the engine should start and run correctly.
This is the the Cadillac Climate Control operates. When you press AUTO, the system will automatically maitain DESIRED temp . The A/C compressor will operate ALL THE TIME on AUTO. Don't want the a/c compressor to operate, PRESS " ECON". Air delivery will NOT be DE-HUMIFIED, nor will it cool, only warm,. Hope this helps.
In my 1990 Cadillac Deville there is a sticker that says that one can reset the computer that controls the compressor by disconnecting the battery for a few minutes and reconnecting.
Did you disconnect the battery to reset the a/c system?
The symptoms you are describing lead me to believe that there is a safety feature that prevents the compressor from engaging when the compressor has been run for any length of time without at least .5 lbs. of freon in the system.
You said that you had to run a hot wire to charge it up with freon. But, if you ran it without freon, it may have automatically invoked the 'safety' feature.
I have seen this happen on my 1990 cadillac. I haven't had any problems on my 1997 Cadillac Limousine, because I never had a low charge on that car.