1996 GMC Yukon System Too Rich

1996 GMC YUKON
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CURTIS FOWLER
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Engine Performance problem
1996 GMC Yukon V8 Four Wheel Drive Automatic

I've changed my plugs, wires, Distibuter cap and rotor and air filter. Codes read(too rich) PO172, PO175, and PO305 misfire. What steps should i take to fix these problems?
Mar 12, 2010 at 9:12 AM
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GEEBI18
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Have the O2(oxygen) sensor checked. It regulates your fuel/air mixture.
Mar 19, 2010 at 2:01 PM
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