20 Most Recent 1984 Cadillac DeVille Questions & Answers

run the fault codes and check for a problem reverse servo/solenoid

The only way I know to do this is to pull the seat and see what's wrong (the gears may be jammed, the motor burned out, etc.). Wiring diagrams are available at Alldatadiy.com

Always check that all frame ground and body ground wires are clean and well connected. Sounds to me like whoever replaced your fuel sending unit did not connect a ground to it very well. A single bad ground can make an electrical system backfeed and cause a lot of things to go haywire. I've seen this happen many times and re-connecting the ground wire after a good cleaning fixes it well.

Bad fuel pump, leak between tank and pump, clogged filter, broken timing chain thus not turning cam thus not activating fuel pump.

Unhook battery or look for fuse to disconnect for 5 minutes

Check YouTube and search their titles.....lots of info there!

Empty the gas tank, fill with good gas.

check your timing. Cadillac use to use a plastic timing gear that would easily strip. Replace it with an aftermarket gear made of metal and you won't have problems for a long time. Why they used a plastic timing gear is the stupidest thing I have ever heard of and when I found that out I vowed to never buy a cadillac again.

It depends on the Engine you have. According to Chilton's Repair manual - a 8 cylinder 250 (4.1) needs to be tightened to 45 ft. lbs, then to 90 ft. lbs. A 350( 5.7) to45 ft. lbs. then to 85 ft. lbs. The sequence for a 350 is:

-Should be 12 volts same as other cars. Good luck Mai

1984 Cadillac Full Size Cadillac RWD
4.1 liter V-8