I have a4 1999 2.8l quattro . When I sstart my car in the morning in runs fine a cranks up no problem, but if I stop and go in somewhere the car will just crank but will not turnover, if I wait about 45-1hour it will start up fine. I figure something electrical is getting hot, my car has 70k on it, anyone experienced this problem, your help would be really appreciated, thanks ty

Have you tried starting it with the gas pedel to the floor?

HERE IS WHERE I AM I HAVE REPLACED

FUEL PUMP RELAY
FUEL PUMP
COOLANT TEMP SENSOR
SUCTION PUMP


THE CAR WILL START WHEN I PUT GAS IN CYLINDER

THE CAR IS NOT GETTING FUEL FROM INJECTORS

POSSIBLE FIXES NOT SURE BUT

THROTTLE VALVE CONTROL MODULE
FUEL PRESSURE REGULATOR
BAD INJECTORS
THROTTLE POSOTION SENSOR
ETC.

PUTTING PEDAL TO THE FLOOR DID HELP- , BUT IT STILL WOULD NOT START

ON BATTERY STARTER AND WITH BATTERY CHARGED UP.

follow up to help others, the fix was fuel pump and relay, the clogged fuel filter probably burned up the original pump, ty

glad to see you got it resolved.