Question about 1990 Cadillac Deville

2 Answers

Hard down shift

I have 90 cadi deville when i come to a stop it down shifts hard the idle is high until i completely stop need help

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 2 Answers

Sounds like your transmission. also it could be the axle, which if it is, consider yourself lucky. you should get it checked out.

Posted on Dec 30, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Idle control motor. Happened to me, they remove it, unless you want to pay $700 for the new one.

However it idles really rough for awhile after startup now, but eventually smooths out. Can cause vapor lock occasionally as well. Good luck!

Posted on Jan 07, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

High idle shifts hard but idle will go back down but shifts hard


You'd probably have to take it in to get it diagnosed, but I'm going to guess that it's the electronic throttle body.
The throttle body and throttle position sensor are in the same unit and if one goes bad, you have to replaced the whole thing.

This will cause high idle, stalling, hard shifts and irratic throttle.

Oct 20, 2013 | 2003 Chevrolet TrailBlazer

2 Answers

1994 Cadillac Deville - won't shift into reverse after sitting overnight or for a couple of hours. Will shift into 1st and then will shift into reverse. What is causing this?


Check the transmission fluid level, reverse needs twice the pressure to activate that drive does. If low refill and try again. If fluid good, I`d say the tranny 3rd reverse clutch is worn out. Recheck the condition of the fluid on the dipstick, if it appears burnt or very dirty I`d still suspect internal tranny clutch issues. It also has a low reverse clutch, but goes into 1st gear as you said.

Feb 02, 2011 | 1994 Cadillac DeVille

1 Answer

THE 90 CADI DEVILLE IS IDLING TO HIGH HOW DO I ADJUST


There is no adjustment, if it's idling too high you most likely have a vacuum leak. Check the vacuum hoses for splits or breaks it could also be the throttle body base gasket. There should also be a idle air control valve which could be defective. But, I'd look and listen for a leak first.

Nov 18, 2009 | 1991 Cadillac DeVille

1 Answer

I have a 1993 cady da ville northstar 4.6 LIT.and th trans wont shift uot of 1st automatic trans


shift solenoids are bad replace them . email me and i will give you instructions brandonday87@yahoo.com .buy the shift solenoids off ebay from electrical advantage i can give you the phone number 614-364-0698 ask for robert

Sep 26, 2009 | 1993 Cadillac DeVille

1 Answer

Idle irradic


could be either EGR valve stuck open or the IAC(idle air control)

Apr 21, 2009 | 1995 Jeep Grand Cherokee

3 Answers

Very high idles and drops into gear roughly


possible vacuum leak or bad idle motor

Dec 14, 2008 | 1987 Dodge D150

2 Answers

1998 HONDA ACCORD EX V-6


It may be the throttle position sensor (tps)

Oct 10, 2008 | 1998 Honda Accord

1 Answer

92 Cadi Deville won't start


Turned out to be the electronic ignition switch...fortunately an inexpensive fix.

Jul 15, 2008 | 1992 Cadillac DeVille

Not finding what you are looking for?
Cars & Trucks Logo

185 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...