I have a 1991 Camaro RS that wont roll over in the morning or 2 hours after driven, When I hold the gas down it starts right up then stalls out when i let go, If I hold the gas down for 10-15 min then it goes into idle after letting go of the gas. It will start right up after doing that until it sits for 2 hours or more then it is a repeat process. Any ideas to what would cause this?

 

Possibly a bad Idle Air Control valve, or a circuit issue. Have you tried flashing for error codes?