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Running lean, misfire

  

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Hi scotty , i have a 2006 pontiac montana 3.5 v6 I've done all i can do on my end but i keep having check engine light because it says on my scanner that i have cylinder 1 burning too lean and misfires . No vac leaks changed and set all gaps on plugs , replaced all sensors checked evap cannister and my c control doesn't work anymore any ideas whats cause anf how to fix? very frustrated. Thaks for any help you can forward to me Ronny. {black}:hi:  


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What are the exact codes? Is there anything suspicious in live data? Did the sensors you replace test bad? Did you use OEM sensors?


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