Question about 1991 Cadillac DeVille

1 Answer

Car turns over but wont start

It will turn over but not start. it started to die on me when i would slow down or go up hill. then just stopped starting. was told it was my 02 senser?

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  • Cadillac Master
  • 808 Answers

No the o2 sensors can not stop the car from starting. I would start by spraying some starting fluid down throttle body see if it starts runs dies if this occurs you have a fuel delivery problem if still just cranks then you have a ignition problem (no Spark)

Posted on Apr 19, 2014

6 Suggested Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Car wont start

if your caddy detected a key that was used but not 4 your car the system shuts down the fuel flow 4 security messures

Posted on Dec 04, 2008

  • 718 Answers

SOURCE: new starter and battery and the car wont start!

Cadillac DeVille no year given
The problem may be caused by the starter relay, fuse, or fusible link. The fuse is easy enough to check.
You can check the fusible link. Sometimes they get corroded or melt and break the circuit.

The starter relay is most likely the problem. Since you did not give a model year.
I can only guest the location of the relay.
Look under the hood on the drivers side, right above the wheel well. Look for a black box. the relays are inside.
If not you can give your model year.


Posted on Apr 24, 2009

  • 135 Answers

SOURCE: 2001 cadillac deville

check diagnostic codes.could possibly be crankshaft and camshaft position sensor

Posted on May 15, 2009

  • 131 Answers

SOURCE: 2002 Cadillac DeVille wont start (even w/new battery!)

well first off, check the glove box light blub, make sure it shuts off when you close the door, check it by pressing the switch with your finger to make sure it shuts off, also check under the hood for the light there if there is one, pull the bulb, and the same thing for any bulb in the trunk, then check again after a day to see if the battery dies, if it is dying while the vehicle is not running then it is the battery, if it is dying after it is running then it is the alt. you can check that also tho with a multimeter set to the DC volts setting, place the black end <the ground to any grounded area> and the red end <the hot lead to the back of the alt. > it should be reading higher then 12 volts, normally should be a higher reading then 12 volts... if you are getting a lower reading or just 12 volts then the alt. is bad and needs to be replaced...hope this helps you out...

Posted on Jun 15, 2009

  • 355 Answers

SOURCE: car wont start, security problem car 1998 cadillac deville

Same that happened to me. There is a detailed write-up here: http://vatspasskey.com . The guy is great, this was the only way I was able to save my Park Avenue. I see it applies to your model too.

Posted on Apr 25, 2010

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Hi i have a mercedes 1999 s320 we were driving up a hill and it just lost an died it now it wont start , there is iginition lights but wont turn over. thank you


Does the engine spin or just click when you try to start it? If it just clicks or there is nothing try checking your battery cables, they may have become loose or they are corroded.

Also because you said you were driving uphill and it started to lose power then died, it could very well be that your fuel pump decided to stop working.

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