| Start with the obvious. (listen and pay attention to dash errors) Then isolate. All an engine needs to start is spark, fuel, and air...in that order. Is there any way you can verify you have adequate voltage going to/from the alt and the starter? Can you verify you have fuel going from the pump to the rail? Check connections at both the PTU (power transistor unit) and CAS (Crank Angle Sensor) make sure they're plugged in and no visual signs of plug damage. An electrical problem can be a once source culprit or a myriad of inoperable devices including connections. I hope you have patients because unfortunately that's the only thing that will help you find your prob (aside from the obvious if you are using special testing instruments) Borrow someone’s ConZult if you can and if all else fails, pop the clutch in 2nd and see if it stays running. Report back and let us know how you fixed it. >good luck
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