car problem please help!!!!!
after driving my 94 z28 m6 lt1 for about 30-40 min it starts missing sputtering, backfireing then it dies,(it comes on gradually) and wont start back up for about 5-10 mins,but then when it does start up it can only go for about 5-10 mins unless i let it set for a coulpe of hours, then it will go for about another 30 mins!!! what is wrong with my car??? i put mew o2's and a new filter on and it still does the same thing!!!!!!!!!! what fuel presure should my car idel at and drive at, im checking that 2-day?????????

