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had the exact same problem....its the ecu,the ground pin on our ecu's are somewhat known to go bad..for a while instead of jumping the relay(cause that worked too)i spliced into the ground pin and grounded it directly to the chassis...again no 5 sec prime nor did the ecu control the pump...wich in result fried my pump and screwed up my ecu and tune all together ...so get another ecu man dont make my mistake!! let us know what happens im almost 100% its the ecu
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