Question about 2004 Cadillac Deville

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Cadillac 2004 deville starts slow and when it does start smells like fuel also after traveling several miles will keep accelerating without stepping on the gas pedal

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The idle control valve is probably very gummed up and needs to be removed and cleaned, possibly replaced-if this continues, it will probably throw a code 9check engine light will come on) and you will end up having the IAC valve cleaned or replaced.

Posted on May 23, 2011

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Posted on Jan 02, 2017

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Check engine light flashing check engine soon smell of gas and not running smouth


Check engine light flashing means there is a bad misfire , it flashes to tell you your damaging your catalytic converter . You need to have it check , you don't won't to have to replace the catalytic converter . Can cost up to $1,000.00 . Flashing Check Engine Light CarMD

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Please help; my Cadillac Concours 1995 use fuel ? tooooooooo much in 100 km use ? 35 liters (9 gallons) without any smoke or missing. What is problem and how can I fix it????


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94 cadillac deville 4.9L turns over strong but will not start. The car started and ran fine yesterday. Has fuel at the fuel rail and fuel pump pressurizes line when key is turned on. Only quirks lately has...


Hello, Check the distributor, remove cap and see what the rotor looks like, it may have worn through,into the distributor cap from the inside. It could also be the module and or the coil. Wish I could give you a better way to go but its where I would start first.

Sep 30, 2010 | 1994 Cadillac DeVille

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1997 cadillac deville- misfires on cylinder #1 when cold and starting up, and also when hot and left off for a few minutes, and then restarted. Runs rough for 15 seconds or so, and then the problem goes...


It sure is. If a plug is truly wet, the energy for the spark will travel through the moisture, rather than across the gap. The fuel air mixture flowing into and out of the cylinder serves to ventilate the cylinder, drying the plug.

Plus, that air is preheated, so that would accelerate the drying once warming up got underway.

You really need to have that head gasket replaced. If this questionable repair gives way (and it almost certainly will), you can get enough water in the cylinder to start breaking things on startup without any warning.

Jun 29, 2010 | 1997 Cadillac DeVille

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1999 cadillac deville hard starting after its drove


TPS throttle position sensor needs cleaning or replacment. or if you run the tank low on fuel you might be needing to replace fuel pump and filter.

May 15, 2009 | 1999 Cadillac DeVille

1 Answer

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this cars are very coming with the leak at the fuel pressure regulator, all you have to do is locate the regulator for the fuel, it is on the fuel injector rail, and unplug the vacum hose if you see any fuel or smell like fuel inside the hose that means the regulator has to be replaced,

May 27, 2008 | 1996 Cadillac DeVille

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