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87 560 SEL IS BURNING RICH! I CHANGED PLUGS BECAUSE THEY WERE BLACK AND SOOTY. IT HELPED FOR A FEW MILES BUT THE BLACK SMOKE CAME BACK. WHAT SHOULD I DO?
 

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Well, search the forums to start. Your CO can be out of whack, but I doubt it's that far.. more then likely your EHA has kirked out. Even running w/o an O2 sensor you Shouldn't foul up that quickly.

How many miles on your car, sevice history? When (if ever) has the fuel system been serviced?

Jonathan
 
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