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Hello, when it cranks and doesnt start does the check engine light come on when the key is turned to on and go out when cranking or stay on when cranking? Cranks normally, doesnt drag or sound like a hiccup?
Ok, long as there is no issue with the red theft lamp for the ignition secruity key I would think a possible problem with the crankshaft position sensor which is the rpm signal to fire the coils and fuel injectors to run. When it has a good signal the check engine light should turn off when cranking
Does the check engine light turn off when it doesnt start? No diagnostic trouble codes stored when checked with a scan tool?
The need to make sure the pcm is getting an rpm signal with a scan tool and if you have injector pulse or spark when it will not crank, one or both, if both are missing, its no rpm signal from the crank sensor or no driver signal to ground from the pcm itself.