walbro fuel pump?

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boostaddict

New Member
Jul 23, 2008
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connecticut
i am running a walbro 255lph fuel pump and one i reach full boost the car seems to sputter and the wideband seems to be reading lean. is the 12v wiring upgrade necessary on a walbro? will upping the fuel pressure with an afpr help this problem?if not does anybody have any ideas what else it could be? any help would be appreciated
tyler
 
92TealSupra

92TealSupra

Supramania's Parts Man
Sep 2, 2008
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Great Lakes State
boostaddict;1137741 said:
i am running a walbro 255lph fuel pump and one i reach full boost the car seems to sputter and the wideband seems to be reading lean. is the 12v wiring upgrade necessary on a walbro? will upping the fuel pressure with an afpr help this problem?if not does anybody have any ideas what else it could be? any help would be appreciated
tyler
Click to expand...

We need more information.
- Stock turbo?
-Stock injectors?
-What Reg do you have? What psi do you currently use on it?
- Type of wide band do you have?
- How many volts run to it?

- - - - - - - - -

Those will help us all help you a lot more if we know what your car has on it.

:hs:
 
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boostaddict

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Jul 23, 2008
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ya sorry i thought i had it in my signature but then i looked and i dont know what happened to it. it has an upgraded ct26, not sure what trim the guy was unsure which one it was since i bought it used, but if it helps his was dynod at 301 at the wheels with 11psi and the rest of his car was bone stock with the exception of exhaust. i also have a 3in turbo back exhaust,550cc rc injectors, lexus afm,aem uego wideband,walbro fp, what ever stock fuel pressure is and whatever volts run to it.and the turbo is set for about 14 psi
 
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sneakypete

sneakypete

Regular Member
Jul 18, 2007
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wow.... try using punctuation if you want some better help. i must be getting old.

i would get an aftermarket afpr to control how much fuel pressure your rail is seeing. the stock fpr is old and has been known to be unreliable with aftermarket fuel pumps with a higher flowrate.
 
lagged

lagged

1991 1JZ
Mar 30, 2005
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new rochelle
ive seen walbros randomly go bad for no reason and with no warning.

if you want an intank pump then the denso twin turbo pump is the only way to go.
 
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boostaddict

New Member
Jul 23, 2008
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connecticut
Poodles;1138563 said:
Unless he's already bypassed the J-tube he's going to be RICH...

I'm betting chinese knockoff walbro...
Click to expand...

so what your trying to say is that with the mods i have the car should be running rich right?
 
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boostaddict

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Jul 23, 2008
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connecticut
what are the symptoms of the walbro to be a chinese knockoff? are there anyways for sure that you can tell. i cant remember excactly where i bought the thing
 
Rennat

Rennat

5psi...? haha
Dec 6, 2005
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when i put a knock off up next to a real one, the REAL one was VERY shiny and "nice" looking... where as the china one was kinda dull... not something most would catch, but both worked fine...
 
deabionni

deabionni

The Lurker
Sep 16, 2007
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Kalkaska, MI
boostaddict;1159823 said:
what are the symptoms of the walbro to be a chinese knockoff? are there anyways for sure that you can tell. i cant remember excactly where i bought the thing
Click to expand...

Most real Walbro's sell at a price around $100. If you paid quite a bit less than that, chances are you have a Chinese fake.

Here's a link from this thread about the Chinese knockoffs.

http://www.fuel-pumps.net/walbro-forgeries.html
 
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figgie

Supramania Contributor
Mar 30, 2005
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<-- waiting for when the Chinese start to knock off Weldon fuel pumps! Not that I want to buy those, hell no. But want to see how much they sell them for :)


Boostadict

you saif the wideband reads lean. How lean (AFR # please).

The walbro is running of the stock wiring? You will NEED to upgrade that wiring as the Walbro pulls more current than the OEM MKIII Fuel pump.
 
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figgie

Supramania Contributor
Mar 30, 2005
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Twin Cities, Minnesot-ah
adampecush;1160611 said:
Figgie, do you know how much current the walbro pulls? (for fuse purposes)
Click to expand...


race engineerings chart is pretty accurate.

You would want around a 20 amp fuse. Reason is that you need to account for about three times the running current (7.5 amps) when the fuel pump is completly stopped.
 
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