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What would cause backfire and exhaust smoke?

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2011-09-13 17:54:11
2011-09-13 17:54:11

It could be timing is off. Need more info. Is it Fuel injected or Carburated? Exhaust smoke? Is it black? Black indicates alot of carbon built up. May mean the fuel is burning way to rich.

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Related Questions


what kind of gasoline are you running? and what color is the smoke?

Plug wires installed incorrectly. Click the link.

If you nicked the oil pan it could cause it to smoke from engine area. Is the smoke coming from the exhaust or engine bay? If exhaust, then I highly doubt it was caused by the curb incident.

There are two things that can cause it. The most likely one is timing too retarded. The other is an exhaust leak. Since your car is fuel injected, you probably have the Exhaust Gas Recirculation system hooked up, and this is where most of the backfire-causing exhaust leaks come from. So it's probably timing.

I know the white smoke would be caused by coolant, which would be leaking into the combustion chamber.

For steam to come out the exhaust you probably have a bad head gasket or a cracked head. If the turbo had an oil seal fail it would cause blue smoke to come out the exhaust.

I feel these are unrelated but you can investigate a leak in the hoses leading to the heater core as they maybe leaking onto the exhaust pipe, that would produce white smoke, but not from within the tailpipe exhaust. Water and oil leaks will produce white smoke the smell will help you determine which it is.

A car backfires because unburned fuel is getting to the muffler. The heat of the exhause system causes the fuel to combust, thus a backfire. I have just been told that the rubber on my exhaust has split - could this be why the car would backfire? I have heard something about air getting into the exhaust could cause a backfire? back fire can be caused by different faults. first is to much fuel because of worn carburetter, or wrong adjusments on carburetter. choke sticking will cause backfire. timing be out of adjustment will cause backfire exhaust leak can cause backfire. bad spark plugs, or plug leads , distributer cap worn of cracked will cause backfire as for fuel in muffler, if it combusted in muffler , the muffler would split open it is not that. and i dont know of any rubber on an exhaust that would take the heat aexhaust manifold gaskets could be problem but if they were rubber they would melt \ is it good or bad to have backfire It can also be done with intentional modification, such as done in ''Keeping Up Appearances'' British sitcom. A fuel line and an oxidizer line are added to the muffler with a manual rubber bulb pump added to the line as the ''backfire button.'' At a point before entering the muffler, the lines have a pair of backflow valves to prevent the flame from racing into the mixture tanks. Squeezing the bulbs dispense a mixture of pure alcohol and an oxidizer into the muffler to create a reaction. For Onslow's car in the TV programme, copier toner was squirted in the tailpipe for a heavy soot effect on the backfire command. Having a car backfire can shake off any parts that aren't bolted completely, and can cause the engine to stall because the pressure of the backfire can temporarily disrupt the exhaust release from the engine. Besides, it would spook horses, cows, or anyone not used to loud noises. So having the car backfire down a Harlem road won't have the same effect, as a car backfiring down a rural city road.

Having no catalytic converter installed is illegal and can cause a myriad of problems. Probably not a backfire though.

The reduction of smoke stack and exhaust fumes that cause the "green house effect" would be reduced

it would cause overheating but the smoke is probally coming from some sort of water or antifreeze in combustion chamber

There are several reasons that can cause smoke two, out of the exhaust on your 1993 Chevrolet suburban. The most common reason is a dirty fuel injector.

There are several things that can cause your 2000 Chevrolet to backfire and die. The most common cause is a plugged catalytic converter.

I would suspect the spark plug wires are installed incorrectly on the passenger side.

My understanding of exhaust smoke is that Blue is oil, Black is unburnt fuel, White is unburnt diesel on cold start. The main question would be, how much smoke and when does it do it?

A cracked exhaust manifold should not cause a backfire, unless your engine is running extremely rich. It would, however, cause the engine to sound very loud and smoke to come out from the engine compartment. If your car is newer than 1996, than a cracked exhaust manifold would turn the Check Engine light on. A blown head gasket would cause coolant to leak into your cylinder head, which would cause large amounts of white smoke to come out of the tail pipe. If the leak is severe enough, then there would be noticeable puddles of antifreeze on the ground where the car was last parked. Even with a mild leak, the expansion tank under the hood would empty periodically and require topping off. If this was never done, then you would notice you car overheating (but the gauge may still read cold because it can only read the temperature of a liquid).

White smoke from the exhaust is a sign of coolant entering the combustion chamber. Most likely cause is a blown head gasket. Stop driving this vehicle until you have this repaired or you will destroy this engine.

The exhaust should be colorless. Smoke is created by an imbalance of the oil:fuel mixture. Black smoke is too much fuel (rich). White-blue smoke would be too much oil.

Answer DIAGNOSE,whitr exhaust smokecould be either 1/ perforated diaphragm on the auto transmission MODULATOR VALVE. OR a LEAKING cylinder head gasket(or cracked cyl head) see IF using water if NOT then probably modulator valve

White smoke from the exhaust is a sign of coolant in the combustion chamber, and can be a blown head gasket or cracked head. This is very serious and will cause severe engine damage. Have this looked at by a professional. A slight jerking motion in the front while accelerating is possibly torque steer. This is normal. Check this out after dealing with the white smoke, which at this point is your first priority.


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