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Old 04-06-2005, 05:19 PM   #1
rsxyz
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Problems with fuel pump on sr swap

My sr is ready to run but ive encountered some fuel problems.
What is happening is when i turn the key to the on position , the car sends the fuel for 3 seconds and it stops . I knwo the fuel is suppose to stop after 3 seconds if the flywheel isnt moving but after i go to crank the car , it gets no fuel at all . Im not sure what is happening. So then I pull the key out and let the car sit for a while. This time i dont pause when i turn the key to the on position and go right to cranking , the car runs for 3 seconds then it stops
because its getting no fuel . For the 3 seconds it was running , it was normal.

So now what's being done is were hardwiring the fuel pump to a switch and putting it in the glovebox. I dont like the idea of having an extra step when im starting and turning off the car , can someone please help me. Im using a walbro 255lph and Ive checked teh relays and fuses , the wires in the fuel pump were spliced black to black and red to red. The black wire to pink stripe has been repinned near the battery location. I might have missed something simple , please help me , thanks in advance.
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Old 04-06-2005, 05:25 PM   #2
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Would it be bad if i hooked up the power to the fuel pimp to a switched 12v source , i know this sounds dumb , but i need some input.
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Old 04-06-2005, 08:14 PM   #3
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Not to sound stupid but did you have the lines hooked up to the fuel rail backwards?
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Old 04-07-2005, 08:01 AM   #4
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Ideally you should check into why that relay is kicking itself back off... but if you are going to just work around it I would suggest running it off a relay rather than a switch that you would have to turn on and off each time......
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Old 04-07-2005, 08:23 AM   #5
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it is a safty feature in fuel injected cars the pump shuts off after 3-5 seconds if the flywheel isnt moving it doesnt matter because it should turn on immideately once the flywheel starts to move.
did you check your fuel lines? return line comes off of the regulator and goes to the lower hardline

if you do hot wire the pump search on here there was a thread last week about how to wire in a relay so it will be switched by turning on your key
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