Heres a little DIY for people looking to install the walbro 255lph fuel pump for their scion tC’s….

Things Needed

1. Standard Tools
2. Dremel


Start off by taking off the back seat cushion, you need to access the fuel pump through the inside of the car, once the back seat cushion is removed you will see a disc plate w/a power line running into the middle….

For this part simply take a flat head screwdriver and begin to pry up the disc plate, its held down by a black sticky tak……don’t jump the gun and grab a blow torch here guys this is not the oil pan……it comes off quite easily. Place the screwdriver on the lower left side, it’s the best angle, pry up and itll come right off.


Remove all connections, and screws surrounding the lower (black) plate below the plate that was sealed by sticky tak


Once everything has been disconnected, take the fuel line and ziptie it somewhere on your car w/ the line facing up so fuel does not shoot all over your car while you work on the pump.

Lift up the pump gently and be careful not to break anything when taking out the housing.

Once the entire housing has been removed from the car disconnect the top and bottom part of the housing, held in by clips, disconnect the power to the fuel pump and with a little push the fuel pump should pop right out.

With the stock fuel pump in hand, remove the clip, rubber ring, and tip from the top of the fuel pump (side where fuel line / power). Loose the tip that was on the stock fuel pump you don’t need it, reposition the clip and rubber ring to the walbro fuel pump….clip goes first then o ring on top, just as it was on the oem fuel pump.

Here is the stock fuel pump with everything removed.


http://i17.photobucket.com/albums/b51/Quagmire817/photo2-4.jpg


Now cut the wires found in the top portion of the fuel pump housing and wire the new power chord. You get provided with the necessary wiring parts (mines from dezod, but if you get it from somewhere else I’m unsure if it comes w/ these parts) but I chose to solder mine here is a picture.

http://i17.photobucket.com/albums/b51/Quagmire817/photo-2.jpg

Once you are finished with the wiring place the walbro back into the fuel pump housing, just as the stock one went in, be sure to have the proper fittings on the pump. Plug in the newly wired power source, and assemble to top part of the fuel pump housing. Don’t forget to place the new fuel filter on the walbro.

The tricky part, the bottom of the fuel pump housing.

The fuel pump has a stock rubber bushing that is much smaller than the one found in the walbro, not only that the bottom half of the fuel pump housing will not clip back in place because of its longer size. What you do is dremel away an opening so the fuel pump can snap back into the housing.

http://i17.photobucket.com/albums/b51/Quagmire817/fuelpumpbottom.jpg


this gives you an idea as to how much you may have to cut. Just be careful not cut away too much, you need something to hold it in place. I chose not to use the rubber piece that came w/ the pump because it just made the pump harder to fit, you cut away the right amount that pump will go in there nice and snug.

Since pieces of the housing were cut, and me being paranoid I decided to get a zip tie and fasten it around the outside of the housing surrounding the clips that snap the unit back into place.

Heres a picture.

http://i17.photobucket.com/albums/b51/Quagmire817/fuelpumpside.jpg

make sure all clips are attached and reinstall the fuel pump.

good job, nice to have a diy on this. I hope this thread doesnt get lost......

someone throw this biznatch in the tec section

btw im not sure but idk if that zip tie will hold up to gas....I would think that gas would melt plastic like that....could be wrong though.

nah, its plastic just like the material that holds the fuel pump

good write up. thanks for the info!

I know this is probably just for turbo rides, but what does the fuel pump do again?

I know this is probably just for turbo rides, but what does the fuel pump do again?



pumps fuel to your motor....

so this wouldnt be pointless if I didnt have turbo?

so this wouldnt be pointless if I didnt have turbo?

only if you had a fully built n/a motor at 2.7 litr w/ a 125shot o nawz

good info, seems like my 550 injectors are a lil short without these

Nothing needs to be said.

A fuel pump's function is to pump fuel. Got it? Useful enough?




Crayola - much apologies for my foolin' with this kid. Great write-up. I hope a mod stickies it and erases all this nonsense of what a fuel pump does.. lol

But yeah a simple explanation of upgrading a fuel pump especially on boosted engine is that it improves the quality spray of the injectors which will result in better burn..

Imagine you are trying to mix/push air and fuel into the cylinder, if you have way more air pressure (boost) than fuel pressure in the cylinder it will result on a bad quality spread (bad mixture) or using stock fuel pump on high boost will result to leaning out since the amount of boost pressure will suppress the fuel spray from making its way to the cylinder.

oh thanks

:clap:

lol thanks for comments guys..........

hopfully this will get thrown in the tech section, reason i did this is that it bugged me so much that there isn't a single DIY on the pump anywhere

hope the mods keep the what is a fuel pump nonsense lol forgot to put what a fuel pump does on teh write up :P

Anyone know if the "install kit" that is listed with this product on Dezod site is something that Dezod does or it that something that comes with the Walbro pump?

Anyone know if the "install kit" that is listed with this product on Dezod site is something that Dezod does or it that something that comes with the Walbro pump?

its got to be somthing that comes with the pump, i got mine from dezod and it came with the the instal kit and it is not in any way tC specific. the pump came with a rubber line 2 mini clamps new fuel filter w/ ring for filter, and instructions for instal on a bunch of different types of universal fuel pump setups, not instructions for
our specific car. all u need from the package is pretty much the pump the power line and the fuel filter w/ ring

Ahh i c. thanks again for this info!

How much louder is this pump over stock?

Nothing needs to be said.

A fuel pump's function is to pump fuel. Got it? Useful enough?




Crayola - much apologies for my foolin' with this kid. Great write-up. I hope a mod stickies it and erases all this nonsense of what a fuel pump does.. lol

sorry had to sig ya :rofl:

and yeah id like to know if its any louder than stock and did it make your current set up run richer than before.......some have said that it may.

good write up quag! lol

lol

and yeah this things loud so if your one who complaints about the EVAP noise ur gona hate the walbro, but my OEM fuel pump aws already messed up so by me putting this is it runs better prob less rich b/c i think my old one was stuck open........................still planning on getting it tuned

Actually just finished drivig around, it really isn't loud at all

nice DIY!

The fuel pump does pump out more volume too... fuel pumps are rated by volume and pressure. I have seen bad fuel pumps to where they could bump up pressure just fine but when the load/demand went up the car stumbled.

The volume on this one is 255 liters per hour, for those that didn't catch that :P

yes volume too.. though amount of volume is usually dictated by injector opening, the bigger injector you have the more fuel pressure you will need. And more pressure=faster spray speed=more fuel :D

yes volume too.. though amount of volume is usually dictated by injector opening, the bigger injector you have the more fuel pressure you will need. And more pressure=faster spray speed=more fuel :D

That statement is correct but missing some info... both injectors and pumps are rated in pressure and volume... If you bump up the voltage on the pump the pressure and volume will increase... With injectors they are rated at 380cc or whatever at whatever the stock fuel pressure is. If you increase pressure and volume to the same 380cc injector it will have a max flow of lets say a 410cc injector or maybe higher.

But too large an injector on a insufficient fuel delivery system and you will starve the rail and have unstable pressure in the rail so you end up with one cylinder running stoich or too rich and one cylinder running lean. Conversely if you have have too much fuel being delivered the car will be more difficult to tune and you will end up with with a crappy idle and horrible gas mileage but WOT should be perfect.

With injectors they are rated at 380cc or whatever at whatever the stock fuel pressure is. If you increase pressure and volume to the same 380cc injector it will have a max flow of lets say a 410cc injector or maybe higher.




Yep! A 550cc injector rated at 3 BAR or pressure might flow 600ccs at 4 BAR or 5 BAR of fuel pressure. Plus if it's a really good injector design like an EV6 or EV9, the spray pattern gets SUPER DUPER sweet and it atomizes perfectly.

paul could you explain more on injector design (EV6,Ev9) id like to understand injectors a little better. btw iv got the dezod (deachwerks...however you spell it...lol) 550cc, i know they are pintle design but are ball type better, what about spray patern on the deachwerks...how would you rate them?

thanks in advance

So for 550cc's is a pump needed? I run 550's and have not noticed any lean spikes at WOT from starving.

Also for anyone considering buying,

http://siliconestop.com/index.php?main_page=product_info&cPath=7&products_id=74

Same part number as dezod, comes with install kit, but about 25 bucks cheaper. (sorry dezod, gotta point out a good deal tho)

^^ depends on how much boost and power you're making with those 550s.. good find

I've seen tcs run 650 & 750ccs on a stock pump, just depends on how much power u wana make 320whp daily on ur stock pump won't hold long IMO

So for 550cc's is a pump needed? I run 550's and have not noticed any lean spikes at WOT from starving.

Also for anyone considering buying,

http://siliconestop.com/index.php?main_page=product_info&cPath=7&products_id=74

Same part number as dezod, comes with install kit, but about 25 bucks cheaper. (sorry dezod, gotta point out a good deal tho)

That site is confusing because it shows two different pump part numbers. The Supra uses pump #GSS341 and The TC uses pump #GSS342 w/ the Supra install kit.

-Jeremy
sstracing.com

the install kit is universal dude its not tC specific at all.

the install kit is universal dude its not tC specific at all.

I know the install kit is universal but most people use the Supra install kit because it has a part # and works on the TC.

-Jeremy
sstracing.com

what does it have that works better for the tC? im pretty sure they should be the same thing.

what does it have that works better for the tC? im pretty sure they should be the same thing.

Do you think every install kit is the same?

-Jeremy
sstracing.com

in a way, the install kit comes w/ instructions to install the pump on many different fuel pump housing setups.

first i would really wanna thank the person wo wrote this DIY it was really helpfull on my install. i am new to this forum and im just amazed by the lack of motivation on some people to do thigs themselfs. i have no idea how much a walbro fuel pump install would cost but im sure more than 100 easy. its cool to drive a fast car but its cooler to build it urself.

i also had a question too. i noticed that since i did the install it takes a while to start the car and sometimes i even have to pump the gas a few times, is this normal?

DIY very helpful! thank you!

first i would really wanna thank the person wo wrote this DIY it was really helpfull on my install. i am new to this forum and im just amazed by the lack of motivation on some people to do thigs themselfs. i have no idea how much a walbro fuel pump install would cost but im sure more than 100 easy. its cool to drive a fast car but its cooler to build it urself.

i also had a question too. i noticed that since i did the install it takes a while to start the car and sometimes i even have to pump the gas a few times, is this normal?

Do you have to do this all the time or only the first time after install?

You really shouldn't notice a difference in start-up. I would recheck everything right away! The last thing you want is your fuel system to fail.

i had to recheck ayways after a day i stop reading my gas level. i know my bad but everything is fine now . i was running 8 psi on stock fuel pump with 650cc injectors and e manage ultimate. now i got the walbro and im goin for a tune @ 12 psi ! my turbo is small so i dont think ill be able to crack the 300s

Good luck with your setup.

I was running 9-10psi on stock pump with a T04E 50trim and it was fine. In fact many people are running at lease that on the stock pump. I only changed mine for peace of mind.

Garrett t3/t4 AR.60( non ball bearing) , cast manifold ( ebay ), stage 3 f1 clutch with fidanza flywheel, tial wg, hks knock off bov (for now), e manage ultimate, walbro 255, custom dp with direct pipe ( no cat at all ) 3 inch piping ( came with the car on a na set up..... Don't ask me ) , fmi with custom piping, I've never been dynod we street tuned the car its taking me forever lots of money issues but been boosted 6 months. I really want one those manifolds that are top mounted my fan keeps melting

You need to get a blanket for you exhaust housing.. you can find them online for like $50 or so. Get some exhaust wrap for your downpipe.

What I thought was the easiest part of my kit has been a big pain.... The walbro pump is longer so it hits the bottom of the tank , well the filter does and cause of this I don't get a good seal and fumes are getting in my car big time. I came up with a plan of using the handle of a hammer to make some type of dent on the tank giving me a little more room. Is this a good solution ? Or is not supossed to hit the bottom of the tank ?

First I've heard of this issue...

So... I was looking around to make sure this was actually in the Tech part of the site (it wasn't, even though the post was marked as Tech - but it is listed now)... and I cleaned up some of the immaturity.

You may now resume your regular discussion.

Mine didnt hit the bottom of the tank.

Yeah mine never hit the bottom of my tank either....somethings up. Try getting a new fuel pump housing? junkyard? our fuel pump housings probably similar to ones in other toyota sedans like the camry etc.

will walbro help with making power without doing complete return fuel set up ?

just fyi, i did this mod. pretty good writeup.

on a side note if you trim the four tabs at the bottom of the walbro, than trim the grommet channel for the fuel filter out of the end cap of the housing it will fit without zip ties...... and will snap shut on its own.

thanks again for doing the hunting for this part. awesome since mine just went out.

Thx again for this. =)

back from the dead!

sticky!

im gonna bump this 1 more time, but would the install of a new stock fuel pump be about the same? or is it easier? just remove stock then put another stock on (reason i ask is i have 125k on my car and i think its time to change it before something happens lol

it's a lot easier though, take out, take apart, disconnect, re-connect new pump and all over again backwards. Pretty easy, I did the walboro in less than 2 hours. I'll post up pics of my work.

i've got the Ptuning kit which came with 550cc injectors and at 13 lbs a/f leans out toward redline so safe is 11.5 for me untill i get teh walbro =)
just in case, the turbo is a 57 trim .83 in the rear....

it's a lot easier though, take out, take apart, disconnect, re-connect new pump and all over again backwards. Pretty easy, I did the walboro in less than 2 hours. I'll post up pics of my work.

is that in response to my question about the stock pump?

is the wireing hard when installing this?

ok the walbro harness come's with a red and black wire red power black ground of course. on the fuel pump harness the wires are blue and black. so would blue be power and black be ground?

most likely but wouldn't the pump come with any wiring diagrams?

no it didint but yes the red went to blue and black went to black. got it up and going earlyer today!

Here are some more pics of the install. I just did my install w/ my friend a few hours ago. In the OP's first part it says to take the rubber ring off and dont reuse the tip, I reused the tip. Also, I cut less off of that white/tan cap so it would stay stronger - it snapped in very snug after dremel'ng the top of the new pump (there is a small bezel/lip on the pump so i cut/sanded it flat) so I did not zip tie the pump - it pretty much fit OEM so I was very happy. Good job original poster - I just wanted to add more pics so guys can perform this upgrade. Also guys, look in my third picture, there is a silver clip in the middle of the pump. Make sure you take that off the old pump and put it onto the new pump so that piece stays secure.


http://www.detailedhosting.com/users/scionlife/fuelpump01.jpg

http://www.detailedhosting.com/users/scionlife/fuelpump02.jpg

http://www.detailedhosting.com/users/scionlife/fuelpump03.jpg

Also, I circled two of the 4 pieces I cut clean w/ the pump and sanded down - The other two are hidden by the housing but they are under that tan cover. If you dont cut them that top tan piece will not snap shut. Between cutting them clean and also dremel'ng a bigger hole in the tan piece (like the OP did but smaller), as talked about above, the tan piece will snap back on and fit very nice:


http://www.detailedhosting.com/users/scionlife/fuelpump04.jpg

what are the gains on doing this after market fuel pump vs stock ?

fuel delivery efficiency - when upgrading your injectors (a lot more then stock) its good to make sure your fuel pump is able to keep up. I will be putting 550 injectors on my car in a few weeks and for $110(ish) for the walbro, its nice to have piece of mind. This is a generic pump that fits pretty easily if you look at my pics and the OP's pics. Dremmel down that top lip on the new fuel pump before even doing the install. Make sure that 4 piece lip is flat with the pump top (that slim white part). I had to keep snapping and unsnapping that yellowish/tan top on and off of the housing because the new pump was 1/8th inch from allowing it to snap shut. Also, you dont need to cut as much off that yellowish/tan top (look at my pic) if you dremmel the pump. mine snaps together just like the OEM which is very nice. It just scared the crap out of me sanding things and then putting the cap back onto the housing ...then finding out it still wouldn’t fit ...then sanding more ...then cutting a tad more off the yellow/tan lid ...then sanding more of the pump ...over and over (took 5 shots cause I didn’t want to take too much off and since I was only the second person to post pics on the install). go slow and keep referring back to this post ...and things will go well. I printed this post and was holding the pump housing up etc etc so i made sure things were turning out just like the pics

hey anyone knows where to get that new fuel pump clip/harness? i've been out all day looking for one that fits but couldnt.. is that the install kit from dezod?

^ ya it comes w/ their kit - you would assume they can sell you one since they prob buy the pumps an make their little bagged kit separate

Is it necessary to use the new clip that they give you? The OEM clip snaps in perfect? Is it due to a slighty large wire?

^ i didnt even try the oem clip - anybody comment on this?

Actually it does clip in fully. Im going to install the one provided by walbro - Anyone have any info in regards to the OEM fpr. I am running a custom return setup and am trying to determine wether to plug or completly remove the fpr in the tank

^x2 trying to set up a return fuel setup and wanted to know what to do with the stock fpr... pop it out? modify it?

you can maybe plug it with some JB weld..

Long time since anyone has posted on this thread, but I needed someones opinion.
I have over 300whp with 12lbs of boost and 550cc injectors and running a stock fuel pump. Occassionally my car will idle weird and rev from 600-1300 rpm and than eventually stay steady at 700 or so rpms. Does anyone know if the cause of this is due to using a stock fuel pump and if so will this help me out with the problem im having. While driving the car operates fine, its just when I come to a complete stop and push the clutch the RPMS are all over the place. If someone can chime in with some feedback id appreciate it.

Thanks