Question about 1996 Toyota RAV4

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Black smoke why there are black smoke when rev engine

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If you have black smoke coming out the end, it means that too much fuel is being dumped into the cylinder, and not all of it has the chance to burn. This is caused by a faulty fuel-management computer, fuel pump, a faulty injector, or on older cars, a poorly tuned carbeurator. This is cause for the least concern, and usually just means you will get bad gas mileage. I would still have it checked out eventually.

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Posted on Dec 11, 2009

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The mix is too rich. You need a major tune-up.

Posted on Dec 11, 2009

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