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How to test or check smog pump (air injection pump)?

(1992 Mercedes-Benz 400SE)
in Gary, IN on October 13, 2010
failed emission test,clucth does not appear to be working
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Popular Answer
of Auburn Foreign & Domestic on October 13, 2010
Pump should have power when 1st started cold. If not check for faulty relay or damaged wires. Mercedes has had issues with the insulation falling off the wiring. Good luck!
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