Possible causes – Faulty spark plug 12– Clogged or faulty fuel injector 12– Faulty ignition coil 12– Fuel injector 12 harness is open or shorted– Fuel injector 12 circuit poor electrical connection– Ignition coil 12 harness is open or shorted– Ignition coil 12 circuit poor electrical connection– Insufficient cylinder 12 compression– Incorrect fuel pressure– Intake…