97gmck1500
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- Mar 10, 2014
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Im new to this site. Not sure if I am posting this in the right area. My 97 5.7 vortec started running bad. Missing backfiring and running extremely rich. The same thing happened a few months ago and it had codes for o2 sensors. The local parts store recommend cam position sensor. Fixed the problem and ran great. Now it's all back. I changed cam sensor crankshaft sensor knock sensor plugs wires cap and rotor. Im baffled could this be worn distributor or is it actually the o2 sensors doing this any feed back would be great