Re: Bad Fuel Pump Relay?
relays chattering in the engine bay is a possible sign of ecu capacitors leaking and f-ing up your ECU. Do you have anyone that you can swap out your ECU with to see if that corrects the issue?
If that proves to not be the problem, next step I'd take is verifying you're receiving fuel and spark. If one of those ends up being absent, then you can start working your way back.
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