350 motor was running rough at low speed and hard starting. runs great with mapp unplugged so i put in a new mapp, nsame cthing runs terrible when the mapp is plugged in and great when its unplugged?
90 gmc 350
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350 motor was running rough at low speed and hard starting. runs great with mapp unplugged so i put in a new mapp, nsame cthing runs terrible when the mapp is plugged in and great when its unplugged? 1 Answer
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