1994 Pontiac Grand Prix inspection

1994 PONTIAC GRAND PRIX
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DMARKEN
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Engine Performance problem
1994 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic

failed on low rpm exahust test.Replaced oxygen senser&cat.coverter.What else?
Dec 6, 2009 at 4:21 AM
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MMPRINCE4000
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How long since plugs/wires have been changed, and what type/brand of plug do you use?
Dec 6, 2009 at 7:25 AM