1. GENERAL INFORMATION People GT 300i TROUBLESHOOTING ENGINE WILL NOT START OR IS HARD TO START Possible cause 1. Check for operation of the fuel pump Abnormal Faulty fuel pump Normal 2. Inspect the fuel flow Abnormal Faulty pressure regulator Normal 3. Inspect the fuel injector Abnormal Faulty injector Normal 4. Perform spark test Weak or no spark Faulty spark plug Fouled spark plug Faulty ECU Good spark Broken or shorted spark plug wire Faulty ignition switch Faulty ignition pulse generator Loose or disconnected spark plug wire 5. Test cylinder compression Low compression Valve stuck open Worn cylinder and piston ring Damaged cylinder head gasket Compression normal Seized valve Improper valve timing 6. Starting following normal procedure Engine start Intake pipe leaking but stops Improper ignition timing (Faulty ignition coil or ignition pulse generator) Engine does not start Fuel contaminated 7. Remove and inspect spark plug Wet plug Throttle valve open Clogged air cleaner 1-16