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Hello! I have a 1990 Cadillac Deville, 4.5L V8 PFI, 75,068 Miles. Today I was driving and all of a sudden the SERVICE ENGINE SOON light came on and both the Fuel In Tank and Electronic Climate Control read outs started showing a “d”. (See pictures in links below). https://i.imgur.com/urkMrQF.jpg https://i.imgur.com/jnIw9xU.jpg https://i.imgur.com/VXwOqxk.jpg Gallery On top of this the Air conditioning fan started blowing air from the dash, not hot or cold, just ambient temperature air and I can’t change the Climate Control or see the fuel level anymore. When I got home I unhooked the battery to reset it then turned the ignition on without starting the car and pressed “Off” and “Warm” on the climate control so see if I could get a code it looked like a code flashed (to fast for me to read), then it read 000 and would blink over to .7.0 occasionally. I replaced some vacuum hoses that were kind of bridle as well as replaced the o-ring that goes between the air filter housing and the carburetor since it was cracked. I hooked the battery back up and the dash read-outs still showed “d”, SERVICE ENGINE SOON light, and the air was still blowing from the dash. I called around and neither Auto Zone or O’rilleys has the OBD 1 connector to scan the older (pre 1996) cars. The car runs great so it’s hard to trouble shoot whats going on, and I cant find anything at all online about this specific problem. Any ideas or suggestions?
Hello, first time post. looked around and everyone seems very helpful. I just acquired a 1994 Fleetwood Brougham. the ac was low on freon so we topped it off and everything was fine for a few days. One afternoon went to start it up, the Air Climate Control (ACC) head unit came on when the key was turned to on position just like it is supposed to. It shows outside temp, but this time a buzz sound come from under the passenger dash and once the car was cranked the ACC head unit display went blank and the buzz under the dash got louder. Also the ac compressor clutch would randomly turn quickly off and on. There is a few vacuum hoses found running to what seems to be small round pumps? we took the black box apart to see what was inside and there are 5 round copper coil pumps or some kind of sensor which is making the buzz sound. when we took it apart there seemed to be a cork like material on the top and it was so brittle it fell apart. Any help would be very appreciated. Thanks