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

65,195

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
555

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

  • not running smoothly 2 answers

    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. mech...

    Cadillac DeVille

    -

    Maintenance & Repair

  • My Cadillac Deville is keep running hot and idk why. It's leaking oil and my transmission fluid is not staying in the car. What advice or steps I should take? 3 answers

    Why is it running hot I seen people say they change the thermostat and water pump and there's no luck wat should I do

    2001 Cadillac DeVille

    -

    Maintenance & Repair

  • 99 Cadillac Deville running hot 2 answers

    No cracked heads, no leaks. Presssure is good, new thermostat. i checked the purge line and it was clogged, cleared that out & it ran great for a few days even running the A/C. I did check the purge...

    1999 Cadillac DeVille Base Sedan

    -

    Maintenance & Repair

  • 97 cadillac deville turns over but will not start 2 answers

    So my cadillac deville will start alright sometimes but most times it will not start. It cranks but no start it will only start up if i spray starting fluid in the air filter i changed the air filt...

    1997 Cadillac DeVille

    -

    Maintenance & Repair

  • Car running hot 4 answers

    I have a 2003 Cadillac DeVille change the water pump change the thermostat new radiator it's still running hot

    2003 Cadillac DeVille DTS

    -

    Maintenance & Repair

Search Cadillac DeVille Questions

Cadillac DeVille Experts

#1 kikero
kikero
Reputation 2,140
#2 Js08016
Js08016
Reputation 1,820
#3 Cynthiasmith
Cynthiasmith
Reputation 1,570
View All

Related Models For Sale

Used Cadillac DTS
21 listings starting at $2,850
Used Cadillac CTS
23 Great Deals out of 335 listings starting at $3,000
Used Lincoln Town Car
13 listings starting at $7,995
Used Cadillac STS
3 Great Deals out of 19 listings starting at $2,295
Used Cadillac Escalade
3 Great Deals out of 392 listings starting at $4,980
Used Chevrolet Impala
59 Great Deals out of 982 listings starting at $799
Used Chrysler 300
87 Great Deals out of 1,104 listings starting at $3,395
Used Ford Mustang
4 Great Deals out of 1,358 listings starting at $5,980
Used Chevrolet Corvette
658 listings starting at $4,450
Used Dodge Charger
89 Great Deals out of 917 listings starting at $3,990
Used Chevrolet Camaro
848 listings starting at $8,995
Used BMW 7 Series
4 Great Deals out of 129 listings starting at $7,495

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.