Question about 2007 Volvo S40 2.4i Sedan
Hi there:Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.
How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found.
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Posted on Mar 05, 2012
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Posted on Jan 02, 2017
SOURCE: Oil Leaking into the exhaust
hi there, there are chemicals on the market that will soften up the seals but these take time to work i would suggest changing the turbo, you will also have to remove the oil from the exhaust system this can be done with other chemicals like an upper cylinder cleaner feed directly in to the air intake but only after the turbo has be fixed
Posted on May 18, 2009
SOURCE: Oil in the turbo, smoking bad!
check to make sure the turbo oil return pipe is not clogged. if it is pressure will build up causing oil leak through seal causing it to smoke.
Posted on May 22, 2009
Yes that is correct. The only filter is inside the fuel tank, and as I recall its a non exchangeable filter. It just gets replaced with the fuel pump when it goes bad
Posted on Jul 19, 2009
what color is the smoke if blue it is oil, if black or grey its fuel ,didyou have theinjectors seviced? if it is oil take it back to who ever rebuilt it
Posted on Jul 27, 2009
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