my 1993 z28 camaro is having issues. if my car sits for a couple of hours. when i go to crank it the engine turns over but will not start. i have to turn it over three times then it will start. the car run good when it is started. and from then on it cranks up fine when it is warm up. but once it sit out for couple of hours it does it again. also when the car cranks up on the third sometimes right after it starts it stalls out and cut off again. but when that next crank it start up fine. the engine is LT1 5.7.