Question about 1996 Cadillac DeVille

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Its over heating everything in the cooling system is new but the emission light keeps coming on and no mechanic can find the problem only thing that i have heard was that my head gasket was no good and i don't know what to do i done spend $6,000 in work on this car i need help

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Sounds like head gaskets to me . have a shop do a block test on it

Posted on Jun 04, 2009

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4 Answers

Why is the check engine light on?


Check engine light is related to emissions problems.
Easiest (Cheapest) way is take car to big box auto parts store like Auto Zone or O'rilleys ?
They usually plug in and diagnos for free hoping you will buy the parts you need there.

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Emissions System warning keeps coming on. Mechanic & muffler shop disagree.


Start with the first mechanic who replaced the battery and have them check the charging system. (Alternator) They should have done this when changing a battery, to rule that out as a problem in the first place. Explain the problems you have been having, as a bad charging system can cause all sorts of electronics problems and have them check the engine codes and have them explain what they are.
You could also go back to the muffler shop and tell them their sensor replacement did not fix the problem and have them correct their work.
Diagnosing Alternator Problems EricTheCarGuy

Mar 23, 2015 | 2007 Acura MDX Tech

1 Answer

Infinity 2004 G 35 overheats when I use the air conditioner. On a hot day I have to blast the heat to cool down the engine. My service engine soon light came on the other day too.


Its low on water or it has a partial blockage in the cooling system.
I'd maybe take to a local repair mechanic and have him look at it?
regarding your light could be a number of things. depending what light it is?
some times service lights come on when it's due for a service.
good luck......

Aug 14, 2014 | Cars & Trucks

2 Answers

I have a 1991 Plymouth Acclaim - 4 cylinder. It will start and run for a while but if I make about 2 runs and come back out to start it, it just turns but will not catch. If I let it sit for about 4-5...


It sounds like your ignition coil is over heating. Was the coil replaced? Your mechanic should have checked voltage/resistance and replaced if needed since it is not too expensive and is a major part of tune-up and ignition system. You can change yourself in a few minutes and save some cash. I had the same problem and had to wait for coil to cool before it would start again. Hope this helps.

Jul 11, 2011 | 1991 Plymouth Acclaim

1 Answer

Over heating 2002 Aztek First mechanic we took it to: replaced intake manifold and water pump, flushed system because dex-cool coolant had caused damage. Still over heated. Same mechanic said it was the...


If the water pump and thermostat have been replaced and the system has been properly refilled and bled , the only thing left is the radiator. If coolant is not flowing through it properly , vehicle will run hot. If your car has overheated to the point of boiling over , your new thermostat may now be damaged again.. As for the fans , they only come on when the coolant reaches a certain temprature. Under normal driving conditions , they would not need to come on while the vehicle is moving , as the air flow from driving down the road would be enough to cool the engine.

Feb 03, 2011 | 2002 Pontiac Aztek

1 Answer

I have a 2002 Dodge Ram Quad Cab 4x4. The a/c runs great as long as the truck is moving, but as soon as you come to a stop it starts blowing warm air. Please help.


Generally if the a/c works fine at highway speeds but kicks out or slowly begins to blow warmer and warmer air as the vehicle is driven at slow speeds or is stopped the a/c condensor cooling fan is usually at fault. At highway speeds there is enough air being forced through the radiator, condenser, and oil coolers to keep everything working and cool but when the vehicle is moving slowly or is parked the electric and mechanical cooling fans have to be working to pull enough air through to keep things working. If the cooling fan isn't working or can't pull enough air through the a/c condensor the system will kick out once the internal pressure reaches a certain point. Once the vehicle is moving again the system can get rid of the heat that it has gathered from the passenger cabin, the pressure drops back to normal and the system cools again. I would start by looking for a blown cooling fan fuse in the fuse panel under the hood. Usually they are 25 amps or larger and run only the cooling fan.

Jun 14, 2010 | 2004 Dodge Ram 1500

1 Answer

Emission lights Acura TL 07 Type S


being an 07 your car is covered for all emmissions related problems for 8yrs 80k miles under warranty. recommend taking to acura dealer,so as to incur no cost to you

Dec 19, 2009 | 2007 Acura TL Sedan New Cars

1 Answer

Emissions reset not it doesn't register for inspection


all of the tests have not run yet.. the mechanic that cleared the codes did not do you any favors. you must repair the problem causing the light to come on. you may need to keep driving it until a light comes on, and then a QUALIFIED mechanic can fix the cause of the light.

Oct 02, 2009 | 2007 Nissan Murano SE

1 Answer

2005 Audi A4 Emission Control System Indicator Warning Light is on. What does that mean?


A vehicle's Emission Control Light is a generalized indicator that there is fault or possible malfunction in the vehicle's operating system. In some cases, these warning lights will come on if a gas cap is not fully closed. It could any one of a number of sensors such as the o2 sensor or map sensor. The thing to do is have a reputable mechanic/technician run a diagnostics test on the vehicle.

Aug 20, 2009 | 2005 Audi A4

1 Answer

Emissions warning light came on. Car runs great


It may be the computer itself. If the light keeps returning, either the computer is faulty or the fans are really failing. I do not recommend dealers but actual mechanic shops.

Jun 30, 2009 | 2006 Volkswagen Jetta

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