Sorry to have upset so many people. If there is a conflict with the crank and injector signal, the engine doesn't know what to do. Disconnecting the crank sensor means it just takes it's signal from no.4 injector. If the the injector pump is delivering fuel, it will run, I have done it. The...

Try unplugging the crank sensor and see if she fires up. Should idle but not rev up.

Haven't been on here for a while, but thought I would mention that I have just got a Rovacom for doing p38 work. Anyone needing help with their p38, should get in touch. Full scanning plus immobiliser switch off. Can do mobile as well. Have to charge, normal rate is £50 but mention the forum and...