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Question edited for clarity. Cranking IS turning over. You are cranking but not firing, or starting, or running.
If you haven't much pressure at the rail, your likely problem is not enough fuel pressure and the fuel pump needs replacing. One post here says you need 39 PSI and another says 49 PSI. What do you have? You need to test with a pressure gauge.
code p 0307 is misfiring on no 7 cylinder ====causes --- engine mechanical fault ---wiring---ignition/ fuel system--injector --ECT/MAF sensor---ECM
look for low fuel pressure or ignition control module
running or not, driving or not? or just key on not running,
and all else works (shoe drops to floor)
runs prefect, all lights work, no dim lights.
battery at 13.3vdc to 15v running
battery terminals clean or ignored?
bad egr if it happens while pushing pedal will also cause a rough idle,if so plugs will have to changed for they are fouled out.going by your posting so if you have more info let me know,black smoke ect.
there are alot of things that cause this same issue.
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