1995 GMC Yukon HELP !!!

1995 GMC YUKON
208,000 MILES • V8 • 4WD • AUTOMATIC
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MISTWALKER5343
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Coming to a stop the engine flexuates from high to low idle... just got it out of the shop for a completely clogged catalytic converter. does this have anything to do with the problem now and what could it be.?
Sep 25, 2008 at 4:19 PM
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BLACKOP555
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convertor should have anythign to do with it unless the o2 sensors are hooked up wrong, does it do it witha cold engine?
Sep 25, 2008 at 6:18 PM