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1990 Cadillac DeVille Questions

Get answers to questions about your 1990 Cadillac DeVille at RepairPal. Find solutions, diagnose problems and get back on the road.

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Backfiring smell strong gas muffler blowing out muffler

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.

car has spark, and fuel pressure, it,s been 4 weeks since it was cleaned and still wont run right. no codes come up !

I found the guide pieces etc. I have searched the net but can't find them anywhere? Any help would be very appreciated! Thank you

Where can they be purchased for the right and left side??

Old system contained freon and will not pass inspection. Is fully functional now. Approx charge ? - assuming no other problems. Car is pristine. If not, do you know any other Cadillac repair shops in this area that specialize in old Cadillacs?

More specific how many hours will a shop take and Charge for?

Next day, other electrical issues popped up. Digital odometer and other in dash displays stopped working.