Why will your Ducato 2.8 jtd not start immobilizer light fine and fuel at the injectors when turning over Glow plug light goes out immediately?

If your Ducato 2.8 JTD won't start despite the immobilizer light being fine and fuel reaching the injectors, the issue may lie with the engine management system or a faulty component in the starting circuit. The quick extinguishing of the glow plug light suggests the glow plugs might be functioning properly, but there could be a problem with the fuel delivery or air intake. Additionally, consider checking the battery voltage and connections, as insufficient power can prevent the engine from starting. Lastly, a malfunctioning crankshaft position sensor could also prevent the engine from firing, even with fuel present.