Question about 2004 Ford F250

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Gray smoke from exhaust from 6.0 diesel

After I start my truck, a gray smoke comes out of my exhaust pipe and does not stop. It just started 2 days ago and i am at a loss. my truck manuel said to check the air filter and i cleaned it. I then drained the water from the feul which it also said to do. my oil level is fine and all hoses and sensors seem to be working fine. I took my hypertech reprogrammer off and that didn't do anything either. please help?!

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  • Anonymous Oct 14, 2008

    steam coming from exaust pipe and leaking coolant from tail pipe

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From my experience gray or white smoke means a blown head gasket. Check the oil and see if there is any water in it. You can also check radiator and see if there is any oil in it too. Hope this helps

Posted on Aug 24, 2008

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I'm looking to purchase a used car. I've been doing online research and saw this webpage http://www.usedcarsmells.com . They talk about exhaust color and smells. Is it true that you could tell a lot about...


Yes this is correct, you can get important information from the colour of smoke from the exhaust:

Blue/Gray Smoke: Blue/gray exhaust smoke is an indication of oil burning in the combustion chamber. These are possible symptoms and causes:
Valve Seals: Leaking valve seals will cause blue/gray smoke at startup because oil leaks past the seals into the cylinder after the engine shuts down.
Valve Guides: Excessive clearance between the valve stem and the valve guide allows oil to leak past the gap into the cylinder.
Piston Rings: Worn or damaged piston rings will cause blow-by resulting in blue/gray smoke.
Worn Cylinder Walls: Worn cylinder walls cause blow-by resulting in blue/gray smoke.
PCV System: A stuck closed PCV valve will cause excessive crankcase pressure resulting in blue/gray smoke.
Black Smoke: Black exhaust smoke is an indication of a rich fuel condition. These are possible causes:
Fuel Injectors: A leaking or dripping fuel injector will cause a rich fuel condition.
Fuel Pressure Regulator: A stuck closed fuel pressure regulator will cause a rich fuel condition.
Fuel Return: A restricted fuel return line will cause a rich fuel condition.
White/Gray Smoke: White exhaust smoke is an indication that coolant is burning in the combustion chamber. These are possible causes:
Cylinder Head: A crack in the cylinder head (around the coolant jacket) will cause coolant to enter the combustion chamber.
Engine Block: A crack in the deck of an engine block near the coolant jacket will cause coolant to enter the combustion chamber.
Head Gasket: A damaged or blown head gasket will cause coolant to enter the combustion chamber resulting in white/gray smoke coming from the tailpipe.

Jan 17, 2015 | Cars & Trucks

1 Answer

My Toyota Innova Diesel emits too much smoke. I've cleaned the EGR valve repeatedly but the problem comes back again after only a few days.


first make sure your air filter is clean. and make sure your oil level is correct.
lack of enough air will cause a lot of smoke and poor fuel economy
lack of air would show as gray to black smoke.
oil burning would be light gray to white

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99 Grand Am Smoke Exhaust


I'm sorry to say your engine may be cooked.
Since you are adding both oil and coolant, and the color of the smoke is gray or white, you have the signs of the engine burning coolant.
The common cause is a leaking head gasket.

Dec 17, 2012 | 1999 Pontiac Grand Am GT

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My 2001 ford f350 diesel just started smoking out of the exhaust


Not bad Diesel or filter,injector more likely, your better off running a KOER test,(Key on engine running test) and do a buzz test on the injector,

Nov 26, 2012 | 2001 Ford F350 Super Duty SuperCab

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Gray smoke comes out of the exhaust pipe when i start driving, even after car is warmed up enough


Check to see if your coolant level is going down. It doesn't take a lot to create plenty of steam.

Feb 18, 2011 | 2000 Mercury Cougar

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Blue smokes come out tailpipe when i start the car but stops afte


Helllo there
Symptom: Gray or blue smoke from the exhaust. You notice gray smoke coming from the exhaust when you start your car. The smoke may or may not disappear after the car is warmed. If it is, it is less noticeable. The smoke may have a bluish tint to it. Possible causes:

  1. The engine's piston rings may be worn.
    The Fix: Replace piston rings. (Generally not a DIY job)
  2. The engine's valve seals may be worn.
    The Fix: Replace valve seals. (Generally not a DIY job)
  3. Damaged or worn valve guides.
    The Fix: Replace valve guides. (Not a DIY job)
Symptom: Engine uses more oil than normal, and there is some smoke from the exhaust. The oil level is low between oil changes. It appears that the oil is being burned by the engine because of the smoke in the exhaust. You may or may not notice the engine doesn't have the same power as it used to.
Possible causes:

  1. The PCV system is not working properly.
    The Fix: Replace PCV valve.
  2. The engine may have mechanical problems.
    The Fix: Check compression to determine engine condition.
  3. The engine's piston rings may be worn.
    The Fix: Replace piston rings. (Generally not a DIY job)
  4. The engine's valve seals may be worn.
    The Fix: Replace valve seals. (Generally not a DIY job)

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Upon starting the 1995 Camry the engine dies. There is also grey smoke coming from the tail pipe. Checked the oil and there is no water in it.


Is it gray, bluish gray, or white? White smoke, during warm weather, indicates that you have a head gasket out and it's vaporizing water, it will look much like it does when you first start it on a cold day. Bluish gray indicates burning oil, which could be bad valve seating, severe engine wear on your piston rings and oil is blowing past them into the combustion chamber. Grey smoke is probably water as well, though it could be contaminated with oil, or the vehicle could be running too rich, getting too much gasoline. But typically this is more of a black smoke than gray.

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1984 Mazda Rx6 (FI) - Gray smoke from exhaust


IF it has injectors that would be the problem but check to make sure if is not carburated if it is probably bad float

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I rekon yer turbos gone on the inlet seal side , pop the pipe from the aircleaner off and see if the turbos shaft moves up n down - engine stopped.

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Gray smoke & lost of power


The engine gray smoke is from excessive fuel burning to give the engine power. I am assuming the vehcle is an automatic transmission. Sound like I would have the transmission check for a lock up torque convetor. The transmission maybe taking off in second gear and starting out in a fail safe mode. I suggest taking to the dealer or tranmission shop.

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