i have a 1988 oldsmobile tornado.3.0 V6.i have a skip in it,it dont happen in the mornings only when it's hot during the day.when i come to a stop it wants to go dead,so i put it in nurtul.and it stops so please tell me what i can do about it?>?/

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1988 Oldsmobile tornado 3.0 V6

Already Tried:
everything i know