not running smoothly

Asked by Jun 19, 2017 at 08:43 PM about the Cadillac DeVille

Question type: Maintenance & Repair

have 90  coupe deville.  ran fine when stored in dec. with full tank of gas and
injector cleaner added.  came out in april keeps acting like it wants to stall out
and even does once in awhile.  mechanic's had it more than i have and still
can't find the problem.  any input would be appreciated.

2 Answers

150,185

If you can drive it long enough to use up the old gas, fill it up with Chevron gas and also add a bottle of Techron. Drive it for a while and hopefully your problems will clear up.

Best Answer Mark helpful
1,365

Five months of storage is not that long. A full tank of gas will not go bad that quickly. That year Caddy had the 4.5 liter V8. The idle motors on those cars were notorious for failing. Either causing extremely high idle, idle low enough to stall. or a combination of both. Those cars still had a traditional cap and rotor ignition setup. Five months of damp storage can easily corrode the contacts.If the car runs well while driving but has a rough idle when sitting still in gear. Check the ignition system. If the car seems to run fine but just dies at idle especially in gear check the idle control motor.

Your Answer:

Cadillac DeVille Experts

  • #1
    kikero
    Reputation
    2,430
  • #2
    Js08016
    Reputation
    2,350
  • #3
    Cynthiasmith
    Reputation
    1,980
View All

Related Models For Sale

Used Cadillac DTS
21 listings starting at $2,995
Used Cadillac CTS
13 Great Deals out of 355 listings starting at $2,400
Used Lincoln Town Car
17 listings starting at $6,995
Used Chevrolet Impala
35 Great Deals out of 1,041 listings starting at $1,994
Used Cadillac Escalade
9 Great Deals out of 759 listings starting at $3,700
Used Cadillac STS
15 listings starting at $6,888
Used Lincoln Continental
40 listings starting at $42,984
Used Chrysler 300
48 Great Deals out of 1,049 listings starting at $3,990
Used Mercedes-Benz S-Class
7 Great Deals out of 204 listings starting at $11,990
Used Ford Mustang
54 Great Deals out of 1,599 listings starting at $1,980
Used Dodge Charger
50 Great Deals out of 938 listings starting at $3,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.