if it was a O2 sensor wouldnt he not have a problem as soon as it starts up sence the O2 doesnt affect anything till its warmed up and before it gets wormed up it goes by settings in the ecu.

could it possible be a stuck open egr i mean if its open at idle ur car will stutter and die if u give it some gas u should be fine. and as far as a code goes i dont have a egr on my car and dont have a code for it.


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