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If you mean the smoke it's usually related to the quality of petrol

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Q: What causes blue exhaust out of a car tailpipe?
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Related questions

What is a tailpipe on a car?

the tailpipe on a car is also known as the EXHAUST of the car where the gases from the combustion happening inside the engine escape.


Would bananas in the tailpipe damage a car?

no but it may cause it to stall if exhaust is blocked


Is it normal to have oil to come out tailpipe when head gasket is bad?

no. when a head gasket is bad coolant goes to the exhaust pipe and causes the car to smoke alot all white smoke.


Is car exhaust a point or non-point source?

Exhaust from a car is a non-point source pollution, because you are unable to mathematically pin point the source of pollution.Answer:The exhaust from a specific car is a point source, the tailpipe. Car exhaust in general for a city is non-point source as it arises from many locations simultaneously.


What does it mean when it looks like there is fiberglass floss coming out of the car's tailpipe?

The muffler is failing, the "floss" is how the exhaust sound is muffled.


What causes a rattle in a car exhaust?

catalytic convertor breaking down, or exhaust touching body or chasis of car


What causes a car to backfire from tailpipe?

while driving yur car reduces speed then pulls off with speed and backfires what can cause that


There's light blue smoke coming from the tailpipe when i start the car what causes this problem?

You probably have a little oil seeping into the combustion chamber while the engine is off. Once you start the engine, this oil is burned and causes the smoke you see.


What if i don't have a tailpipe?

Your vehicle will be illegal and you may be arrested. The car could also catch fire from the hot exhaust escaping where it should not do so.


What causes oily residue to form on the inside edge of the tailpipe?

One of the by products of combustion is water, when you start the car, the exhaust pipe will be cold, the water will therefore condense from gas on to the cold metal of the exhaust ( you can often see cars will water dripping from the exhaust on cold mornings!). Oil will also do the same thing, especially some of the thicker parts of the diesel.


Does water dripping from tailpipe mean the catalytic converter is faulty?

No, water coming from the exhaust is normal in small amounts. The temp differences causes condensation. When the car sits, the exhaust is cold or ambiant temp. When the vehicle starts, the exhaust system warms up, causing condensation. There are actually weep holes in most mufflers to let the water out to prevent rust.


What causes water condensation to come out of tailpipe?

When you start the car, the hot exhaust condenses on the interior of the cold exhaust system. This is normal for a few minutes until the exhaust system warms up. If the water smells and taste sweet, and you are continually adding coolant, you may have a blown head gasket. If this is the case, do not continue to drive the vehicle as serious damage will be done to the engine.