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Old 03-18-2003, 04:54 PM   #1
Zephyr
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Default Fuel Pump Controller Issue on WRX Swap

Like the title of the thread says.

Has anyone else who has done a swap run into this issue. On the WRX you have a fuel pump controller that routes power from the fuel pump really to the fuel pump. On the RS the fuel pump get's it's power directly from the fuel pump relay. There are two wires that come off the ECM that power the fuel pump controller that I'm not sure what to do with.

Bottem line is do I need to use a Fuel Pump Controller to make the car run.

Many thanks to the kind soul who can shead some light on this issue.

If you have any solutions please IM/PM/e-mail me with any input.

Zephyr
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Old 03-18-2003, 05:17 PM   #2
BOY
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WRX fuel pump drops right in and uses the same connector. At least it did on my 99.
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Old 03-18-2003, 06:10 PM   #3
Aspen
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IIRC the engine will run without the fuel pump controller but it will be slightly rich down below.
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Old 03-18-2003, 06:39 PM   #4
Zephyr
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Thanks for the help guys.

Z
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Old 03-18-2003, 08:29 PM   #5
Hondaslayer
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Yamarocket630 Did the swap with the controller,Perhaps he can shed some light on this.



John?



Ben,
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Old 03-18-2003, 09:16 PM   #6
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Do you have the harness for the controller?

If so then:
Unplug the white two prong plug underneath the seat.
Plug in the new one, which is connected to the controller.
The other two wires that go to the ecu (light green and violet wires) connect to the controller.

Intercept the power wire that goes to the old rs pump (black & red) to the new wrx controller (Black &Yellow). The black wire on the controller is ground.

This can all be done by the passenger side kick panel.

Adam
i-speedusa.com
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Old 03-18-2003, 11:21 PM   #7
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Default Thanks for asking the question

I will be starting on my swap soon and this will surely help.
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Old 03-19-2003, 09:06 AM   #8
BOY
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what's this talk of the controller? The pump itself drops right in and plugs right in. No complaints or problems thus far other than 420cc injectors being way too big for my needs right now
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Old 03-19-2003, 10:06 AM   #9
Zephyr
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Yes I am well aware that the pump just drops into the tank and you plug it in but the issue is not the pump, it is the pump controller. On the WRX it has a fuel pump controler that opperates the fuel pump rather than just taking power directly from the Fuel Pump Relay as on the RS. The fuel pump controller is operated by the ECM.

After speaking to a few people I have learned that either you run the FPC or you have to run the fuel pump all the time by bypassing the fuel pump relay altogether.

Z
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Old 03-19-2003, 10:37 AM   #10
BOY
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hmmm, I just plugged in the pump and have had no problems thus far.
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Old 03-19-2003, 10:59 AM   #11
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yes but you are running a RS ecu

wrx ecu needs the fuel pump controller
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Old 03-19-2003, 11:02 AM   #12
BOY
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doh, now I see what's going on. I wasn't making the connection between this was WRX ECU going in on me
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Old 07-23-2003, 10:21 AM   #13
Boost4U
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So lets see if I can get this straight...... You need to run the WRX pump controller, but do you need the WRX relay?? And also, do you need any of the wiring from the WRX to make the controller work??

- Chris
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