Question about Chevrolet S 10

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When the air conditioner in our chevy s10 tahoe is turned on, smoke comes into the cab and fogs over the windshield and it smells like exhaust fumes but we are not totally sure. have you heard of this problem occuring before?

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  • joeyworth Aug 26, 2008

    thanks so much, what can we do to fix the problem?

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I believe it to be your heater coil is about to go out on you

Posted on Apr 07, 2013

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Yes you have an oil leak on the back side of the engine and when you turn on the fan for the a\c it sucks in all that burning oil fumes

Posted on Aug 26, 2008

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1 Answer

Air vent schematic


air for the inside of the car comes from the vent at the base of the windscreen or is recirculated inside the car
if you see what appears to be mist, fog or smoke from the ac vents ,it is extra cold air from the ac system that is seen as fog when it hits the air in the car
you will know exhaust fumes by the smell

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My 1999 chevy blazer is running rich where I smell fuel fumes can this cause the truck to loose power and not go over 30 but the engine runs smooth


Most likely, A good "burn" is the right Fuel-air mixture. Too much fuel bad burn lots of black smoke. Not enough fuel It may not burn at all. Any emission codes? I will bet it won't pass an emissions test, so get it fixed. Probably affects mileage. Do you smell fuel in the engine compartment? you have a dangerous leak. Or do you smell at exhaust? Do you smell in the cab?
Probably leak in engine bay, or even under the truck's fuel line, filter, pump. or tank.

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2005 chevy malibu when trying to start car smoke comes from coolant resivor wont start smells like exaust fumes. As the enine rotates smoke comes out same pattern as rotation of engine.No water mixed with...


white smoke could be head gasket leak. but white smoke will come with warm engine. If engine is first start cold. IT's only water in exhaust system

Sep 23, 2013 | 1992 Chevrolet Cavalier

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Fumes in 2000 Toyota Sienna


On the dash there is a switch/lever that allows you to select fresh outside air or recirculate the air in the cab. Any smell may be coming in the freash air position which would allow smelly air from the engine to come into the car. Check for broken flexible exhaust piece or leaking gaskets around the cat converter to start with or a hole in the exhaust pipe inself

Jan 26, 2013 | 2000 Toyota Sienna

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It has a bad mis and running rich dark foul smelling smoke what's wrong? 1991 chevy v6 s10


possibly a faulty injector for the miss but if you have a head/headgasket problem it would account for the exhaust. Do a compression test and radiator pressure test to eliminate that area of concern

Jan 19, 2013 | Chevrolet C1500 Cars & Trucks

1 Answer

I have a 2000 Chevy Silverado 1/2 ton. I smell antifreeze in the cab when it is running. I haven't noticed any leaking on the floorboard or any fogging on the windshield. Any suggestions as to what it...


Yes your in the right area, it should be up under passenger side behind housing etc., where blower motor is located. If you haven't noticed coolant return bottle level going down then I would have the cooling system pressure tested to see if it drops, indicating a leak somewhere. Also check all your hoses and connections especially near firewall where they go in to vehicle, in case there is a small leak at fitting or hose and the fumes from it are being drawn in through fresh air intake under cowl at base of windshield. It might just be an external leak, and fumes are being drawn into cab.

Feb 18, 2011 | 2000 Chevrolet Silverado 1500

1 Answer

Coolant fumes coming out of dashboard ventsfoging up the windshield and bad coolant smell


Your heater core is shot. It's leaking coolant inside the truck, causing the smell and fogged up windshield, it needs to be replaced.

Dec 10, 2009 | 2001 Chevrolet S-10

1 Answer

O2 tahoe


Probably not. Residue on the passengers side rug is likely either from a leaky heater core or a blocked air conditioner evaporator drain. Is the residue slippery feeling? Does it have a sweet anti-freeze smell? If you blot it up with a white towel, does it have a color?

If it is colored the same color as your anti-freeze (green, orange or pink, depending on what type your tahoe uses) and has a sweet smell, my bet is the heater core is leaking. This would also cause fogging on the windshield when using the front defroster and a sweet smell from the air vents when the heat is turned on.

If it just seems like water and seems to get worse when you use your air conditioning, it is likely a blocked AC evaporator drain.

In any case, neither of these problems are likely to be related to an intake manifold job.

May 28, 2009 | 2002 Chevrolet Tahoe

1 Answer

2001 Windstar-Heater Core Prooblem?


hello you are in need for a heater core what you are getting is antifreeze leaking into your heater box wich is very dangerous while your driving fumes can make you sick

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