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cranks but wont start

  1. R57 cranks but won’t start.

    Second Generation Faults & Fixes
    Greetings folks, I have an R57 S convertible with the cranks but it will not start. I’ve read everything I could and narrowed it down to a 30 amp relay. I tried to replace that but no change. Help me please. All the voltage and power is good. I’m afraid it could be the ECU.