walbro pump with out a fpr

[lppro]

so i was looking at buying the walbro fuel pump to upgrade my stock one. my quistion is can i do this without gettng a fuel pressure regulater?

 

[p5150]

I dont know if your stock FPR would be able to handle the extra flow or not - better safe then sorry. I would get one but somebody else may have some experience running a walboro without it.

If you do it make sure to remove your J tube

 

[lppro]

is this crap or will it work?

http://cgi.ebay.com/ebaymotors/Supr...ryZ46098QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[MDCmotorsports]

May work but I wouldn't trust it unless its Aeromotive....

 

[lintlars]

its been done many times by many people just be sure to either bypass or drill out the j-tube so you do not run mega rich

 

[mkIIIman089]

Works fine.

 

[lppro]

how about a SX fuel pressure reg.? are they good?

 

[SupraDupra500]

i installed my 550s and lex and walbro all at once.. i ran waaayyyyy rich on stock fpr.. so rich it would barely run.. i installed the aeromotive, set it at 42psi and it was cured

 

[A-to-the-J]

i'm running a walbro w/ the stock fpr. i've got no problems. but then again, Jose did it for me. Most people know the Jose effect, he can touch your car and you'll stop throwing codes! :bigthumb:

 

[vert88]

i installed my walbro before i left on deployment and i had no problems with it running rich and i did not drill my j-tube but i will once i get back and install my lex afm and 550 high impedence injectors so go ahead and install your pump and while you are down there throw in a new fuel filter to be on the safe side vert88

 

[mkIIIman089]

i installed my 550s and lex and walbro all at once.. i ran waaayyyyy rich on stock fpr.. so rich it would barely run.. i installed the aeromotive, set it at 42psi and it was cured

I would love to understand the thought process that brought you to that conclusion.

 

[Keros]

I would love to understand the thought process that brought you to that conclusion.

I would imagine the stocker fails open so as not to lean out the engine... that's just a guess though.

 

[dbsupra90]

I would imagine the stocker fails open so as not to lean out the engine... that's just a guess though.

open would be low pressure, which would lean the motor.

thats what the j-tube restriction is for. if the fpr fails, the restriction allows enough backpressure to the fuel system to limp the car home.

in my 9yrs in the game, ive seen people run a walbro pump just fine with everything else stock. ive also seen where the fpr will fail, or the fuel pressure is high due to the j-tube restriction. thats why i always advise to drill out the j-tube. restriction = pressure. too much restriction = too much pressure = over rich.

 

[SupraDupra500]

MKIIIman089,
thats just what happened. It's just a simple diagnosis, any monkey could have figured it out. The car was running just fine on stock pump, fpr, injectors. When i installed the 550s, lex, and walbro, it would barely start. when i got it to start it would smoke like a diesel and the wideband wouldnt even register anything more than 9.0, or full rich. so just to confirm, i pulled plugs, tehy were wet with gas. So i parked her until i got my aeromotive. I installed it, set the pressure to 40-42 psi and the problem was immediately cured.
Thats just the luck ive had. Ive had the strangest issues with this car. A friend of mine put a walbro on his supra about 2 weeks before i did, and his was just fine. Could have sent me the wrong pump i suppose, but that's my experience.

 

[mkIIIman089]

You RAISED the fuel pressure 2 psig. That was not what solved your problem.

 

[jetjock]

http://tinyurl.com/27eukw

 

[SupraDupra500]

who said it was running 40psi with the stock FPR and walbro? maybe the FPR was bad? maybe the pump was wrong? i dont know. But look at the facts. I installed the walbro, 550s, lex, etc. Running way rich. So i in turn installed an aeromotive FPR. Boom, problem fixed. I dont know what the fuel pressure was before i installed the FPR, but i know what was wrong, i addressed the problem, it got fixed. If it was the wrong pump sent to me by mistake, i could have been at 60 psi. All i know is what i said. the ONLY variable i changed was the FPR. that is what fixed my problem. i know of one other person who had this problem. not quite as bad as what happened with me, but he installed the aeromotive and that fixed his problem too. I'm ASE certified A1 - A8 and P1 bud, this is not my first rodeo.

anyone else tired of SOME of these teenagers on here thinking they know all? lol wow.. maybe if i had enough $$ from my mom and dad and donated to SM i would know everything too.

 

[mkIIIman089]

I'm ASE certified A1 - A8 and P1 bud, this is not my first rodeo.

Countless times I have seen people say this and it has never meant anything what-so-ever. If the FPR was the problem then your pump was also so pathetically (read: impossibly) weak that it couldn't even produce enough pressure for you to realize the issue.

And the jab at my age... well... I'll let you remain happy with your complete ignorance. I'm not surprised, though, that in your ASE certified mind, it came up. I donated MY money because I have been on this site since before "the hack", and knowing that it had been provided completely ad free until recently, I could help with the cost of running it.

 

[SupraDupra500]

look man, i apologize for the jabs at your age. my bad man. ive talked to MDC motorsports and 2 local performance shops. they both know exactly what happened and they both know thats what fixed the problem. I think the company i ordered from sent me the wrong pump and maintained a higher pressure at the same voltage, and in turn caused a super rich condition. I dont know exactly what happened it was more than a year ago. all i know is i put on the FPR and THAT and ONLY THAT is what fixed my problem. end of story.
Dont bother responding to any post of mine on this thread i will not be returning to it.

Thanks