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Re: Replaced fuel pump and relay. Still no fuel. Pump...
In theory, yes, but in practice not a good idea except to verify operation. Pump relays are usually controlled by the ECU and get power from the IGN switch. Double check your grounds at the pump.
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connect the positive wire to the ignition wire ,, so it only turn on when you ignition turns on.. if needed for an emergency run it directly to the battery.
I would bypass the relay and power up the pump then check fuel pressure at the injectors. The pump may not have power after the relay turns off. You may also be loosing power to the ignition module or coil.
Replace the relay. Probably runs around $12. If your bypassing by using a direct hot instead of bypassing off the relay hot trace the hot side of the relay all the way back till you find the break.
NO. is the fuse good? is power getting TO the relay? if power is at the relay, you should be able to bypass the relay and feed power directly to the pump. If you are sure there is no power to pump, then the wire has an open between the relay and the pump.
you may want to check on the wiring. also test on the pumps if they go bad after replacement by bypassing the relays and connecting it to the battery. Either way it may still be the wiring. The bad wires or connection and even relay may send intermittent power to the pump. IT could also have fried your pump should it not work when directly connected.
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