Top 20 1992 Cadillac DeVille Questions & Answers

Question edited for clarity, spelling of the maker, toss in some CAPS and make sentences. Question moved to model category. Both are Transmission errors E-39 Error https://caddyinfo.ipbhost.com/topic/10886-92-deville-error-code-e39/ and E-98

Diagnostic Code -- E98 Need Help

Cadillac Owners Forum https://www.cadillacforums.com > threads > diagnostic... Nov 9, 2005 - E98 - High RPM P/N to D/R in ISC Range check your tranny. its sometimes called a VCC overstress error. dont change gears until car is totally ... Great, now I have MORE trouble codes!! E91 and E98 Aug 7, 2006 Error codes E22, E32 E52 E98 - Cadillac Owners Forum May 5, 2004 More results from www.cadillacforums.com

Firing order is 1 8 4 3 6 5 7 2. Under the hood, front bank of cylinders, from left to right, 1 3 5 7 The rear bank of cylinders from left to right 2 4 6 8. Odd and even banks. good luck

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

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

I would wiggle the connector to the light switch it could just be a bad connection likely the master control for all the lighting

Not without testing ? Your best bet , take it to a qualified repair shop.

May be the fuel lines or bad distributor

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.. Search from over 10 Million Auto Parts http://www.rockauto.com/en/catalog/cadillac,1992,seville,4.9l+v8,1027730,literature,repair+manual,10335

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.

check the brake booster for a vacuum leak under brakes

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

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.

I believe you are correct - the radiator is probably plugged, but you should also check the water pump.

this is a question?

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.

I would chrck the ground at the pump and maybe put a extra one in that area!!

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.

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

images for Question about 1992 Cadillac DeVille wiring

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.