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Originally Posted by Tigger300E
I took my Benz out for a spin the other day and I noticed that when I floored the gas pedal, while accelarating really hard there was black smoke coming out of the tail pipe. Is this a normal symptom under heavy acceleration?
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Full power = full fuel. Black smoke = unburned fuel. While it should not leave a cloud like a diesel, it is not uncommon to see black smoke from high-performance gasoline engines under heavy acceleration. Your fuel economy could be low if the injection system is biased towards too rich all the time, and a lot of unburned fuel means the catalytic converter(s) have some overtime work to do. You might have your fuel management system checked.
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While searching the forum I found something called "italian tune-up". Is this only for diesel cars? Or maybe I should add some injector cleaner?
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You certainly can try the 'Italian' method of tuning, it won't hurt the engine. You could also have the fuel management system checked...
Best Regards,
Jim