Question about 1996 Cadillac DeVille

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My 1996 Cadillac Deville takes too long to start if it hasn't ran for a while, and when it does start, it runs rough for at least 15 seconds.

Posted by J HAll on


1 Answer


Check fuel pump & pressure,may be failing

Have you worked on the car at all, in the last couple
years, or just driven it,that could be a factor also

Posted on Mar 27, 2013

  • 2 more comments 
  • J HAll Mar 27, 2013

    I recently had the fuel filter and Oil changed and it didn't help.

  • Anonymous Mar 27, 2013

    Fuel Filter & Oil Change wouldn't do a thing,that is preventative maintenance

  • J HAll Mar 27, 2013

    lso a code for my o2 sensor came up it said it was upstream bank 1 sensor 1 .

  • Anonymous Mar 27, 2013

    O2 Senors get changed at 100,000 miles on all vehicle That won't have anything to do with starting They only work in closed loop for fuel control after the motor is warmed up



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SOURCE: 1994 Cadillac DeVille Concourse - Runs rough?

The "check engine" light will "light" when there is a malfunction in the engine management system. The fault code is then stored in the computer. The computer must be scanned to retrieve these stored faults to pinpoint the malfunctioning component. We recommend buying your own scanner and doing it yourself. With a pocket scanner you can check for fault codes to find out why the light came on in the first place. You can clear your cars trouble codes after you replace the malfunctioning sensors.

Posted on Jun 26, 2008



  • 3 Answers

SOURCE: 97 cadillac deville starting disabled car will not restart.

Like they say, "Cadillacs are easy to break into, but hard to steal!"

Posted on Aug 08, 2009


  • 2 Answers

SOURCE: cadillac wont start 1996

Aye, I would check or have the Ignition control module checked. Also the crankshaft position sensor imputs to the ICM. No crank signal being recieved means the control module wont send the spark out as the module has no idea where the piston position is. Surprised your local GM techs could fix this. I am a GM and ASE master certified tech who has spent the last 9 years with our local Cadillac dealership.

Posted on Oct 27, 2009


  • 416 Answers

SOURCE: 2000 cadillac deville the service engine soon

need to have system checked to get trouble code

Posted on Jan 21, 2010

Testimonial: "thanks "


  • 118 Answers

SOURCE: 2003 cadillac deville rough idle with blinking ses

have the head gasket checked,pretty common on these

Posted on May 07, 2010

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1996 deville runs then doesn't?

You need to find out what is missing when it won't start , spark - ignition system or fuel pressure . No Start Diagnostic Basics EricTheCarGuy

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1991 Cadillac Sedan Deville idling rough

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Rough idleing in2000 deville

Need a professional mechanic to take a ride with you
driving & check all data,especially short term fuel trim.

The O2 Sesnors have less than 100,000 miles?

Do a cylinder leak down test,you have lots of miles
on the motor,so stay with basics & be sure you have
anything left in the motor mechanically

Don't know the car so what controls the idle,& is there an AIC
Valve to clean

Nov 20, 2012 | 2000 Cadillac DeVille

1 Answer

I have a 1990 Cadillac Deville with the 4.5. I was curious if that car came with air suspension stock. I noticed a little compressor like thing right be hind the battery turn on when I was jacking it up....

The compressor will turn on when the rear air shocks are low. These shocks will begin to leak with age, and if new, can be damaged if you raise the rear end without disconnecting the battery. The shocks will fill with too much air and create a leak. If your motor runs continuously, you may need to replace the shocks. May also have a leak in the air hose going to the compressor. Check the fitting. Short fix would be to disconnect the power going to the compressor, but your ride will suffer.

Jul 18, 2011 | 1990 Cadillac Deville

1 Answer

When i first start the car it runs rough and when I take off it blows out a gray cloud from the exhaust and then runs fine and idles fine at lights and stop signs, Only a problem when I first start it

My 1997 cadillac deville started up rough for the first 15 seconds then the problem went away as I ran it. Also, it blew a cloud of sweet smelling fluid when I would shut it off hot and restart a few minutes later.It's a blown head gasket.

But, there is a $33 solution from Bar's Leaks that worked for me from Advance Auto. It's available at most reputable auto parts stores. If the leak is small enough it will seal.

Jun 08, 2010 | 2000 Cadillac DeVille

2 Answers

Inconsistent/rough run at idle & poor plugs, new wires, new O2 in front of cat conv,,,no codes

Have you tested the alternator and battery? Maybe be the throttle position censor as well.

Jan 26, 2010 | 1996 Cadillac DeVille

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