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Old 06-04-2010, 03:58 PM   #1
SikSilvrSuby
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Rallispec LTD

Angry Fuel Pump not coming on...

i have an 05 wrx that i just swapped my buddys 02 wrx motor into... motors in great shape, etc.... the fuel pump will not kick on whatsoever. I replaced the pump with another W255... i feel the relay under the dash kicking on, i checked all the harness connections and connectors, theyre all in good shape, and the ignition powers everything else on, just not the fuel pump. any suggestions??? oh yeah and at the fuel filters everythings dry, theres no fuel in the lines so the motor is 100% not gettin fuel. thanks
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Old 06-04-2010, 07:46 PM   #2
DeatschWerks
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Time to grab a volt-meter! Check to see if you are getting power at the plug near the gas tank. The relay might be switching, but it's possible something else is interrupting the connection.
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Old 06-04-2010, 09:46 PM   #3
SikSilvrSuby
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i had the volt meter out. i was getting 6 volts at the pump through the plug on the top cover. or something along those lines. apparently theres a relay for the fuel pump in the trunk passenger side as well...i was trying to find it..no luck. so im thinking i got a ground issue or a pcm issue.. since all the fuses are good. im thinking about running power and ground jumper wires along the interior like the harness is and splicing it with an accessory wire so the pumps only on in the key on position. easier than chasing a wire for a break or something.
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Old 06-05-2010, 12:04 AM   #4
paintbing
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Whenever I need to disconnect the fuel pump, I always disconnect the big brown wire harness below the glove box (next to the door).

Make sure your friend didn't disconnect this and not tell you.
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Old 06-05-2010, 08:39 AM   #5
SikSilvrSuby
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nah man...its all connected.. wtfffffffffff
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Old 06-06-2010, 12:14 AM   #6
Haelan
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Fuel pump controller would be another item to check. Located behind trunk liner on passenger side.

Edit: The service manual has more info on reading the voltages on the controller terminals; what to expect, etc. Check all your fuses as well (SBF-5 is power to the fuel pump controller). The ECU dictates the fuel pump duty cycle. If it is sending 0% for some reason the pump will not cycle.

Last edited by Haelan; 06-06-2010 at 12:27 AM.
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Old 06-08-2010, 12:26 PM   #7
96accord
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SikSilvrSuby: any updates?

I'm having similar problems
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Old 08-17-2010, 05:04 PM   #8
chodezilla
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I'm with 96accord on this one. Any updates? I know it's been a few months, but I have the same problem (6v at the plug and the pump doesn't turn on) and wanted to know if you got it working.
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Old 08-17-2010, 06:27 PM   #9
goat630
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bad ground after the pump. if your getting power to the pump its most likely a ground issue.
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