Top 20 1992 Cadillac DeVille Questions & Answers


I don't quite understand the abbreviation "GSO" however I have a link to how to read error codes from the car on board diagnostics which can be a start for diagnostic mechanic?. https://www.youtube.com/watch?v=x7_llsru9vA

1992 Cadillac... | 13 views | 0 helpful votes


is the fan motor working at full speed
check for blocked cabin air filter
the vacuum only works the vent controls and as you can feel the changes of the vents , it is not vacuum

1992 Cadillac... | 151 views | 0 helpful votes


Hey Alonzo,
Sorry to hear this.. I hate when people butcher a NICE vehicle.. I would take it to a local alternator/starter/battery specialty shop.. they will know right away what wire goes where!!

If you want to fix this yourself... here are some manuals..

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http://www.rockauto.com/en/catalog/cadillac,1992,seville,4.9l+v8,1027730,literature,repair+manual,10335

1992 Cadillac... | 172 views | 0 helpful votes


Sounds like you have a either a vacuum leak or a cracked fuel line allowing extra air to be sucked into the carb fuel mixture. Make sure all small to medium sized hoses are well attached to their fittings and do not have any cracks in them.

1992 Cadillac... | 44 views | 0 helpful votes


Jumper 12 volts to the blower motor and see if it runs, it may be a defective motor.

1992 Cadillac... | 110 views | 0 helpful votes


Next time you have the problem check the fuel pressure, bet you have none. The fuel pump is electric and located in the fuel tank. These fuel pumps last on average about 100,000 miles, less if you run the tank lower than 1/8 due to the overheating it causes the fuel pump due to the loss of lubrication and cooling from the fuel it sits in.

1992 Cadillac... | 36 views | 0 helpful votes


this is a question?

1992 Cadillac... | 28 views | 0 helpful votes


This problem is most often caused by the air mixing valve (usually its actuator has stopped working - fails in the cold position) so I would start there. Not sure about a 92 - could either be an electrically or vacuum controlled actuator. You can check vacuum at the HVAC control unit with a vacuum tester.

1992 Cadillac... | 53 views | 0 helpful votes


Code 30 means the idle speed control RPM is out of range.
The computer can not keep the idle speed in the correct range.
Could be the control servo, a wiring problem, or something like a vac leak.

1992 Cadillac... | 140 views | 0 helpful votes


It might be in 3rd gear could be in limp in mode if computer detected a problem, hook up a scanner and have it checked for codes

1992 Cadillac... | 171 views | 0 helpful votes


take the alternator to an accredited auto electrician for a bench test
they are fairly robust but if it has an internal regulator , some circuit may have cracked or the brushes may be damaged or a terminal insulation could be dislodged.

1992 Cadillac... | 73 views | 0 helpful votes


I think it is the glove box if not check under the driver side dash

1992 Cadillac... | 69 views | 0 helpful votes


The engine is burning oil if oil deposits are on the firing end of the spark plug. Possible worn valve seals/guides or worn oil control/piston rings

1992 Cadillac... | 69 views | 1 helpful votes

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