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

83,105

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
945

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
    2,250
  • #2
    Js08016
    Reputation
    1,940
  • #3
    Cynthiasmith
    Reputation
    1,700
View All

Related Models For Sale

Used Cadillac DTS
21 listings starting at $9,850
Used Cadillac CTS
10 Great Deals out of 364 listings starting at $2,500
Used Lincoln Town Car
21 listings starting at $1,850
Used Cadillac Escalade
4 Great Deals out of 489 listings starting at $4,980
Used Chevrolet Impala
181 Great Deals out of 1,101 listings starting at $996
Used Cadillac STS
3 Great Deals out of 13 listings starting at $3,690
Used Mercedes-Benz S-Class
8 Great Deals out of 125 listings starting at $2,988
Used Chrysler 300
123 Great Deals out of 981 listings starting at $3,495
Used Ford F-150
650 Great Deals out of 12,632 listings starting at $3,000
Used Lincoln Continental
55 listings starting at $53,999
Used Dodge Charger
76 Great Deals out of 795 listings starting at $2,000

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.