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My 1999 Taurus SHO runs well but blows black smoke and the soot is discoloring.

(1999 Ford Taurus)
in Dallas, TX on April 27, 2012
The tail pipes are very black. How do it best adjust and/or tune the engine ?
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on April 28, 2012
Don't know,but that's the symptom of an engine running too rich,so it's fuel injection related.Is the air cleaner clogged?
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on April 28, 2012
I'll check out the air cleaner and replace it if dirty. I'll also run some injector cleaner through it. Is this type of fuel delivery system tuned by computer or is it a more conventional system ? If it is a computer based system ? Can the fuel to air ratios be diagnosed by the computer at most certified auto repair shops ? Thank You
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