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Hi iam hoping somebody out there can help with a non start issue, the engine cranks over but doesn't start ,I've narrowed it down to the ecu not inputting earth to the various relays ie engine control relay fuel pump relay and supplying grounds for injectors and coils and various sensors but my question is why the 3 ground wires to the ecu are present and grounding. There is over 12 volts supplied to ecu from battery but only 8 volts supplied through ignition why is this? Any help would be grateful. Thanks.
 
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