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Black smoke coming from my 97 Toyota corolla

I have a 97 Toyota Corolla Plus. There was a leak in the gas tank so we changed the tank. Once that was done we noticed that there was black smoke coming from it. Figured it was just burning of old gas. After a day of driving it. The smoke was getting worse so we changed the fuel filter and then she started to have no pull. So we changed the fuel pump. That still didn't change anything. So we changed all the plugs and wires, and she seemed to be pulling and getting her speed back but the smoke was still bad. So we let her sit for the night and tried it again the next day, and its back to no pull again, and the smoke is very heavy coming from it. And its burning the gas fast. What can be causing the smoke and what can we do to fix this?
Tks

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The black smoke is a sign of excessive gasoline not burning completely, there is a wide range of probabilities that may be causing this to happen my best advise would be to have it diagnosed with a scanner, otherwise you could spend a lot of money replacing "probable" malfunctioning parts till you find the one that was broken (eg: EGR valve, MAF, coils, injectors, etc.) good luck

Posted on Jul 15, 2009

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