Question about 2000 Chevrolet Cavalier

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Turn key, cranks but no fuel still after new pump.

I dropped the tank and replaced the pump yet, turn the key and still no start. It cranks but still no fuel pump "activation" sound. New coil packs, plugs, wires. Not sure anymore what there is between the key and the pump.

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Every key cycle(5 secs appart) will turn pump on for 3 seconds.This is done to insure pressure at the injector when cranking,otherwise hard starting would insue.The engine computer drives a relay in the underhood junction box which sends 12 volts to the pump.An audible click of that relay and the pump can be heard key on/engine off for 3 secs via the ignition signal to the ecm which drives the fuel pump relay.

Posted on Jul 16, 2009

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