1990 Cadillac DeVille Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Cadillac DeVille
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1990 Cadillac DeVille ProblemsCar Won't Start and Security Light is On
Problems with the anti-theft systems using the raised-chip key can prevent the car from starting. The wires in the steering column to the ignition lock cylinder tend to break. The the key and ignition lock cylinder must be replaced to correct this condition.
One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
The engine may develop oil leaks from the lower crankcase portion of the engine block. Our technicians tell us that the engine must be removed from the vehicle to properly repair this oil leak.
1990 Cadillac DeVille QuestionsMy car idles so rough , like it's receiving shock treatments. (2 answers)
It's two months now since the engine bay was washed on my 90' Cad. and it still idles and surges to much to drive safely. Why isn't there a mechanic that can figure out what electrical component got wet. Ten mechanics and none of them know anything !
car is getting fuel, spark, air,etc. what could have gotten wet to do this.? Seven different mechanics said they don't know what it is wrong with it.
It's a 1986 Cadillac deville, the fuel indicator was blinking and Empty sign . I replaced a fuse now it's constantly reading the fuel is Full.