I have a 93 lumina that cranks but no start, checked spark and fuel both good,just for laughs tried carb cleaner in intake nothing. car died suddenly while accelerating and hasn't started since, took to local mechanic and he thought possible computer problem switched out computer with new one and still getting 11 hard fault codes also I should mention that the new computer didn't take out the old fault codes when he reprogrammed it, I am at my wits end, thinking a possible short somewhere?? does anyone have any ideas on this?? thanks!