Question about 2001 Pontiac Montana
My 2000 pontiac has code 420 when on idle is ok on drive or park I step on the gas it drives like motor mounts are broken I let the gas go and it rolls good I change coils wires plugs crank shaft speed sensor I even took of converter thinking it was plug it,on stray pipe replace EGR and still have the same problem, please help lucky fly 119@ yahoo.com thanks
Posted on Sep 17, 2010
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Posted on Jan 02, 2017
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