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

70,135

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
835

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

Add photo

Related Questions

Search Cadillac DeVille Questions

Cadillac DeVille Experts

#1 kikero
kikero
Reputation 2,160
#2 Js08016
Js08016
Reputation 1,880
#3 Cynthiasmith
Cynthiasmith
Reputation 1,600
View All

Related Models For Sale

Used Cadillac DTS
21 listings starting at $4,995
Used Cadillac CTS
22 Great Deals out of 316 listings starting at $2,500
Used Lincoln Town Car
10 listings starting at $1,850
Used Chevrolet Impala
63 Great Deals out of 915 listings starting at $799
Used Ford Mustang
9 Great Deals out of 1,263 listings starting at $1,000
Used Cadillac Escalade
3 Great Deals out of 363 listings starting at $4,980
Used Chevrolet Corvette
658 listings starting at $4,450
Used Chrysler 300
72 Great Deals out of 1,045 listings starting at $2,487
Used Mercedes-Benz S-Class
9 Great Deals out of 146 listings starting at $5,980

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.