Car won't start 1985 Audi coupe 4000. Changed Sparks wires , ignition coil , fuel pump, fuel filter underneath car by pump. Still won't start I sprayed ether straight into the engine head and it fired up and died right away. Don't know what to check next. I'm going to check timing belt and fuel pump relay. But when the key is on you can hear the fuel pump faintly. What else could be wrong. Please help.