FAILED EMISSION HIGH CO ON START UP. IT TAKES 3 TO 5 MIM. TO GO IN CLOSE LOOP. Most of the time 2500RPM O2 switcting let idle 2 to 5 min. idle very 50 rpm +or- O2 start to go rich idle will jump up 500 to 800 rpm then back to 750 rpm ECM go open loop O2 sensor...

FIX posted 7/25/2011

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