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Old 07-05-2017, 05:11 PM   #451
SjSteven
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Default 16 sti fuel pump

Hi. Will this setup work for the new STI? I have a 2016 STI and want to wire in the walbro 450 fuel pump in.
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Old 07-05-2017, 06:06 PM   #452
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Quote:
Originally Posted by SjSteven View Post
Hi. Will this setup work for the new STI? I have a 2016 STI and want to wire in the walbro 450 fuel pump in.
Not sure, you just need to make sure you're tapping into the signal wire. I'm not sure if the wire coloring in the 15+ compared to the 08+ is the same. The relay has it's own power and ground so it just needs signal to work. Find a wiring diagram for your fuel pump and go from there. If you need any help reading it post it up here and I will help ya out.
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Old 07-05-2017, 09:21 PM   #453
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Quote:
Originally Posted by gsrcrxsi View Post
this is probably why you're killing pumps. you're over volting it.

I've read through the description of the JMS unit and can't see how it helps if youre not sagging voltage below 12V under load.
Sorry for late reply to this.... I confirmed with Walbro (Jeff at VE Petersen) the pumps can handle the voltage increase. He sent me a chart that shows flow with different voltages up to 20V.

Crazy as it sounds... my problem ended up being a bad 100 amp fuse.. the center conductor (fuse link) broke away from the end cap causing low current when the fuse heated up... The failures were occurring at the gas station just after a fill up.. had car towed home after last failure.. let it cool down... and the fuel pump started working again.. I pulled the fuse from the holder and one of the end caps stayed in the holder... upon inspection of the connection points I could see where it had been arcing. I replaced the fuse and all is good.
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Old 07-05-2017, 09:31 PM   #454
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Quote:
Originally Posted by kenny_ View Post
Yea i had that problem. If you use another another ignition source outside the fuel pump wiring as suggested it solve that issue.

I didn't like the fact the fuel pump stays on priming all the time with the suggested method so I cut the positive wire and hooked it up with another relay. That 2nd relay gets an external ignition source. Stops priming when it should but still no fuel pump duty.
Sorry x2 for the late reply... I have zero current draw with ignition off using this wiring shown in image... There is 12v+ at the relay pin 85 but no current draw until FPC closes the negative side (pin 86). This method maintains the factory pump priming function and safety fuel pump shut off in the case of an accident. (because the stock FPC is driving the relay that provides power to the pump itself)

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Old 09-28-2017, 04:11 PM   #455
SubieMonster69
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Default So Confused

I don't know about you guys but this mod thread got really complicated. To save myself the hassle I found a PnP FPC Kit from iWire. Came with decent instructions and only took me an hour to install. You can find it here is anyone is interested https://www.iwireservices.com/produc...r-hardwire-kit
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Old 10-03-2017, 09:54 PM   #456
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Quote:
Originally Posted by SubieMonster69 View Post
I don't know about you guys but this mod thread got really complicated. To save myself the hassle I found a PnP FPC Kit from iWire. Came with decent instructions and only took me an hour to install. You can find it here is anyone is interested https://www.iwireservices.com/produc...r-hardwire-kit
That is cool and all. And for someone that isn't into electrical it is a solution. But it is $250 for what should be a $75 job. Wether they make their money is by making the pin connectors.
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Old 10-04-2017, 10:22 AM   #457
JarHarms
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That kit is interesting (pricing aside) and has some nice features.
I do not see any circuit specs listed to confirm exactly "how" the hardwire is being performed. I wish they would link the actual install instructions for review. None found on product page or install doc page.
It appears to be high-jacking FPC pins 6 and 7 to control that super fancy relay/fuse block. So a true hardwire w/o any pump modulation capability. Which makes me think...what happens if that relay/fuse block fails? Is it an expensive or hard to source item?
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Old 10-10-2017, 09:17 AM   #458
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Can anyone tell me exactly how to hardwire a 12 wrx using the duetsworks kit? Iíve gotten so many mixed answers reading through this that I donít know which actually works right.
Stock fpr
Flex fuel kit
Walbro 255
Id 1300ís
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Old 10-10-2017, 12:55 PM   #459
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I would say do it the way they the directions say! otherwise do it one of the 10 different ways in this thread.
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Old 10-11-2017, 01:19 PM   #460
WOAH BRAH
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Default How To: Re-Wire Fuel Pump For Constant Voltage

I can confirm that this thread makes it a lot more complicated than it should be.

I can also confirm the DW hardwire kit works great by following the instructions provided and maintains the duty cycles. Works just like factory except more voltage going to pump which is what you want.

For a 12 wrx with a walbro 255 stock fpr and stock fpc this works with no issues of running 100% and no draw issues.

Red from relay to battery (least intrusive method is through driver side under carpet through big gromet at top left of driver footwell. Use coat hanger to feed wire through LF fender to battery. This looks very clean too! the only spot the power wire is visible is on the battery positive cable.

Blue and yellow wires from relay to fp harness wire green with yellow stripe wire . One is spliced into fp side one is to harness side (sorry canít remember which donít have directions near me. Will update when I get home.) I crimped them but I plan on going back and soldering.
**Before you splice wires make sure you run your power wire through the fp cover hole and not outside of it or you will pinch the wire when you put your fp cover back on. Also the length is excessive so you can de pin the power wire and shorten it and if you accidentally didnít run power through hole.**

Drill a hole in cover and Mount the relay under the fp cover with a dampener. The wires running to the pump are short and itís not a great idea to put it on top where people sit

Passenger rear seat belt bolt. is a great ground and close to your fp relay. Run your ground there.
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Old 10-12-2017, 02:40 AM   #461
Oleg B
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Hello all,
I'm in progress of building engine and installing rotated turbo (APS DR65 (Garret cartridge GT3582). Will go to parallel fueling setup (rails, AN6 lines).
Will install Walbro 450, planning to connect it as stock pump. Question: are stock wires will be able to hold Walbro 450 or they are too thin?
Other mods: ID1000, Kelford 272, Manley standard valves, springs, retainers.
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Old 10-12-2017, 12:31 PM   #462
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Quote:
Originally Posted by Oleg B View Post
Hello all,
I'm in progress of building engine and installing rotated turbo (APS DR65 (Garret cartridge GT3582). Will go to parallel fueling setup (rails, AN6 lines).
Will install Walbro 450, planning to connect it as stock pump. Question: are stock wires will be able to hold Walbro 450 or they are too thin?
Other mods: ID1000, Kelford 272, Manley standard valves, springs, retainers.
How much boost are you gonna run? the 1000 should be fine on pump and race gas, but not gonna cut it on e85. As to your question about factory wiring for a walbro 450, yes you can get away with it, but doing a pump hardwire is going to be your best bet to get the correct voltage to that pump.
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Old 10-12-2017, 04:12 PM   #463
Oleg B
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Quote:
Originally Posted by stu View Post
How much boost are you gonna run? the 1000 should be fine on pump and race gas, but not gonna cut it on e85. As to your question about factory wiring for a walbro 450, yes you can get away with it, but doing a pump hardwire is going to be your best bet to get the correct voltage to that pump.
Thanks for the input! On my previous setup I was running 1.7 Bar (25 PSI) of boost with TD05-20G *8cm2. My fuel is pump gas with 100 RON octane (= 94 PON or AKI, it something would be in USA like 93+ Premium) and we don't have E85 nowadays at all.
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Old 10-13-2017, 01:50 PM   #464
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Well If you have a FPR you can stretch them further if you set your base to 60psi they become close to 1300cc
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Old 10-13-2017, 02:18 PM   #465
Oleg B
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Quote:
Originally Posted by stu View Post
Well If you have a FPR you can stretch them further if you set your base to 60psi they become close to 1300cc
Thanks! I'll discuss with my tuner, he is known at NASIOC: https://forums.nasioc.com/forums/sho...&postcount=290
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Old 01-09-2018, 05:31 PM   #466
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For those curious on the IWire kit.
It is wired for 100% fuel pump operation
It uses pin 6 and 7 from the fpc to trigger a 70A, 12VDC steady-state relay
This is a Eatons Bussman series power relay module, 3770series about $25 alone.

Read through this whole topic and sure a number of ways to do it. For simplicity I wired my fp using the DW kit and followed the diagram from brazzl161 post #320.
Leaves the ground side intact going through the stock fpc. and triggers the relay off pin 7. We shall see if it works out when I get my re-tune. Dw300, id1300, afpr, e85.
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Old 01-28-2018, 04:55 PM   #467
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Quote:
Originally Posted by WOAH BRAH View Post
I can confirm that this thread makes it a lot more complicated than it should be.

I can also confirm the DW hardwire kit works great by following the instructions provided and maintains the duty cycles. Works just like factory except more voltage going to pump which is what you want.

For a 12 wrx with a walbro 255 stock fpr and stock fpc this works with no issues of running 100% and no draw issues.

Red from relay to battery (least intrusive method is through driver side under carpet through big gromet at top left of driver footwell. Use coat hanger to feed wire through LF fender to battery. This looks very clean too! the only spot the power wire is visible is on the battery positive cable.

Blue and yellow wires from relay to fp harness wire green with yellow stripe wire . One is spliced into fp side one is to harness side (sorry canít remember which donít have directions near me. Will update when I get home.) I crimped them but I plan on going back and soldering.
**Before you splice wires make sure you run your power wire through the fp cover hole and not outside of it or you will pinch the wire when you put your fp cover back on. Also the length is excessive so you can de pin the power wire and shorten it and if you accidentally didnít run power through hole.**

Drill a hole in cover and Mount the relay under the fp cover with a dampener. The wires running to the pump are short and itís not a great idea to put it on top where people sit

Passenger rear seat belt bolt. is a great ground and close to your fp relay. Run your ground there.
This exactly. Thank you. While I had the fsm/wiring schematics I was not 100% on the green/yellow being the correct wire. It travels through the controller and the relay as does the green red. What confused me is the green/red is fused per the schematic, and the green/yellow changes color out of the controller. Obviously I'm no electrical schematic guru!
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Old 04-20-2018, 12:02 PM   #468
nickpman
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Default



Just to simplify for everyone. This is a hardwire diagram I made after getting so confused with this thread.
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Old 06-20-2018, 02:04 AM   #469
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I've read though many of these pages but it's not quite clear to me what we figured out for the 05 STi.

If i'm ok with running at 100% fuel pump duty cycle, is it sufficient to ground the pump and aftermarket FP relay to the chassis? I have the wires from the fuel pump coming out of a bulkhead connector and am trying to figure out where to go next.
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Old 07-25-2018, 01:56 PM   #470
contaminatrix
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wow! something so simple became sooooooooooooo complex. anyway, I finally got around to doing this mod after 2 days of reading (including on legacygt.com).

i used this guy's model


<a href='https://photos.google.com/share/AF1QipPq7dgKl3bxGhxx3dNUAddoNHgxGe78oki2C8pW8Ricox kpi5a4xYjmVeDGY2x9BQ?key=MVdFVkFqalZzZk82cUZkZTRmM WtnY3djV0pOSEd3&source=ctrlq.org'><img src='https://lh3.googleusercontent.com/KMKgxlyk-2YGt_2dYoESpdEQ3MU6_O8HDoDX78DXxIDO7cwTsBB4pUYK3bR famrEf0eO7CzLEWSON_Zsa2wYHirjC_bn6Qw6kmDk3YiPWmwLg aG_YWmMgQIbyP70dG_HPQmDlNiV-w=w2400' /></a>



this is my harness.i couldn't find a 30A fuse in my pile but I found 25A. that's what I used.


<a href='https://photos.google.com/share/AF1QipNn-OMactmDPuZjmqlh2OQF43g3PuG6T-x2U2Cpr_FWiX_HFdgJYdcvue4WLna-_g?key=azJ6RFllQUc0czFnLUY4QnRTNEhWbFJBWDhpT0dR&so urce=ctrlq.org'><img src='https://lh3.googleusercontent.com/tPQuTnhYF9TrtjuowTh_FbFfPE3xfLeUJsfm46LI4glUf_SY5e UwunRpNN6wDkPZrUwOMed5cLmqIck_I1-fgWF9MCuuyRhJUJYNIVLRUdYQ8Y3bQThpygrRTpd2mZ2iZclrP BIF-A=w2400' /></a>


these are the final connections in the fozzy. (that little black connection box is what we get for the fpc ) i spliced the ignition switch to what used to be pump +ve (coming from under the dash).


<a href='https://photos.google.com/share/AF1QipPnuFrVisEcLeY1VNom-eE7vXeyqhJ0nQA-17wEQohVQYp_Au06vQErPrc3v9QCxA?key=LTI5ckZKX1psdWN 1NVREZDAzWlNfYTZCVzBxYnpB&source=ctrlq.org'><img src='https://lh3.googleusercontent.com/wOra38BdmAdH4suY_qBehGStT3-MZ66jdkur9FAzO3jDgRTqwH7doKnUtYzsvHYHG9h5iwSR7C_cf 9SpqsqYBnouINR803AZ_KO_e3aaimg9DDJobG3BSsZrK54exZS Qq1I2tJ3jEQ=w2400' /></a>


here is the voltage reading


<a href='https://photos.google.com/share/AF1QipNO2fOjN7FYuNgw4PTFD_r2Y3dEoLgpiGJQrthXbujOBL QVIVinIh-_1T4SBXpNWw?key=am9IZkF5MmlsY3o5NnQwQjlWR05sX3c5T0 tqcUVB&source=ctrlq.org'><img src='https://lh3.googleusercontent.com/UmOa9TYHVAz07RGy_DwrjVsU2S2ra3eiXQo0isB1Dsa4ZcJEGF 37mLuwhgfaqU1WBzqQewysh4-g1tBaJWYfTBKKU2RByrnmnimSN3Utc5YFsw0F1yOiU60Q-FG_zify0KrXn2G43g=w2400' /></a>


PS: don't mind the dust and leave it out of the comments.

i hope this helps someone. thanks to the OP for this. it may have been years ago but see what you did

Last edited by contaminatrix; 07-26-2018 at 04:37 PM.
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Old 07-25-2018, 04:26 PM   #471
Oleg B
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@contaminatrix,
Pictures are not visible.
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Old 07-26-2018, 04:39 PM   #472
contaminatrix
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Quote:
Originally Posted by Oleg B View Post
@contaminatrix,
Pictures are not visible.
What about now? Can you see them? I've updated. I'm not too sure how Google photos works. I can put direct links instead.
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Old 07-26-2018, 05:39 PM   #473
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Originally Posted by contaminatrix View Post
What about now? Can you see them? I've updated. I'm not too sure how Google photos works. I can put direct links instead.
Go to your Google photo, right click, open in new tab or window, then right click on image and select copy image address. Then head to nasioc and insert the copied text into the image box
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Old 07-27-2018, 01:14 AM   #474
contaminatrix
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Quote:
Originally Posted by PDXREALTOR View Post
Go to your Google photo, right click, open in new tab or window, then right click on image and select copy image address. Then head to nasioc and insert the copied text into the image box
That's exactly what I've done but he can't see them. I can see them though.

Let me do it this way

The model I used - https://photos.app.goo.gl/ug4xArTusFkAab7r8

My harness - https://photos.app.goo.gl/B2agaodtXB336EGF6

Fozzy 02 fpc - https://photos.app.goo.gl/ZxMMEQ8Dz2oGJMJp8

My final connection - https://photos.app.goo.gl/LYQ5NfEBVL8oAnWXA

Voltage reading - https://photos.app.goo.gl/gCqrLYeqxkcx5AAe8

I hope they're visible via the direct links.
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Old 07-27-2018, 01:23 AM   #475
PDXREALTOR
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Quote:
Originally Posted by contaminatrix View Post
That's exactly what I've done but he can't see them. I can see them though.

Let me do it this way

The model I used - https://photos.app.goo.gl/ug4xArTusFkAab7r8

My harness - https://photos.app.goo.gl/B2agaodtXB336EGF6

Fozzy 02 fpc - https://photos.app.goo.gl/ZxMMEQ8Dz2oGJMJp8

My final connection - https://photos.app.goo.gl/LYQ5NfEBVL8oAnWXA

Voltage reading - https://photos.app.goo.gl/gCqrLYeqxkcx5AAe8

I hope they're visible via the direct links.
Sorry, I forgot to mention you have to put the photos in an album that is 'shared'. I have an album named 'for internet forums'

It really is a pita, but when you look at photo bucket it makes it seem a bit easier. Lol.
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