Question about 1991 Cadillac DeVille

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Misfire backfire car runs really rough cant turn on any lights or stand on the brake changed plugs an wires

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1 Answer

I would assume the wires are on wrong,
wouldn't you ,it back fires

Did it do that before any work was done?

Posted on Dec 07, 2012

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Posted on Jan 02, 2017

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chiquititas
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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

  • 135 Answers

SOURCE: 2002 cadillac escalade ext misfire, shifting problems,

change spark plugs,check for valcum leaks. multiple misfire is spark plugs,coil or wires

Posted on May 19, 2009

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SOURCE: multiple misfire trouble code

my truck did the same thing. turn out it was a Max Air Flow sensor. cost for part is 350.

Posted on Oct 28, 2009

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SOURCE: rough idle. rpms drop. misfire.

try your coil packs they go over your sparks or do plugs first and see what happens do affordable first

Posted on Feb 01, 2010

  • 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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