Upgrading fuel pump

[JCell]

so lately ive been losing fuel pres at the fuel line when i go into boost, and thus i am leaning out at higher RPMs. This happened when i installed the 626 intake mani. i was at the protege garage site and stumbled at this

http://siteground207.com/~protegeg/product_info.php?cPath=32_167&products_id=398

I do plan on upgrading my setup to use an EMS, nothing too crazy, then hopefully build the engine and use bigger injectors @ 12-14 PSI

would this be helpful? or is it a maintenance thing? is there another fuel pump I should be looking at?

[mp3-79bronco]

just get a ssafc... i dont think its a delivery prob..proably more of a tuning

[Captain KRM P5]

over time the stock pump does have trouble keeping up with boosted applications. if you're planning on double digit PSI down the road, going with the Walbro is not a bad idea at all

[JCell]

so does it slowly fail over time.... or just shut off at one point?

[mp3-79bronco]

would i have to retune anything with the walbro?

[23dude]

you dont need a tune to run the walbro fuel pump, right?

[Captain KRM P5]

no sir

[JCell]

is it an upgrade or just a better piece that performs the same duties as the stocker?

[Captain KRM P5]

it is a huge improvement in flow and power

[JCell]

phenomenal, i should be ordering one soon

thanks for the info Ken

[23dude]

i will be ordering one as well in couple of weeks

[Deatschwerks]

A walboro is probably the first modification i would do in a turbo car. When it comes to tuning for more boost, even when your injectors are sufficient, the factory fuel pump can cause a lean condition that makes it look like your injectors are maxed out, when really its the fuel pump that cant keep up.

[Captain KRM P5]

A walboro is probably the first modification i would do in a turbo car. When it comes to tuning for more boost, even when your injectors are sufficient, the factory fuel pump can cause a lean condition that makes it look like your injectors are maxed out, when really its the fuel pump that cant keep up.

thanks for chiming in mark :) if you guys place the order for the pump and injectors through me i'll take a percentage off for you as well.

[KrayzieFox]

Hmm.. I think I might be joining the fuel pump upgrading bandwagon. Better stock up Ken.

[Captain KRM P5]

they are in good supply right now

[magnumP5]

I've had my Walboro for nearly two years and I've not installed it because I didn't think it would be necessary until higher boost levels. So are you all saying there would be a benefit to installing this even if we're at, say 10 psi?

The other thing keeping my from installing is that there seems to be so many things that can go wrong. I'm afraid I'm going to tear, rip, loose, drop something, etc that will screw up my car.

[23dude]

Is it hard to install them?

[Captain KRM P5]

I've had my Walboro for nearly two years and I've not installed it because I didn't think it would be necessary until higher boost levels. So are you all saying there would be a benefit to installing this even if we're at, say 10 psi?

The other thing keeping my from installing is that there seems to be so many things that can go wrong. I'm afraid I'm going to tear, rip, loose, drop something, etc that will screw up my car.

it takes a load off your injectors. if you have less pressure on tap you'll need to add fuel by increasing duty cycle and pulsewidth. by having more flow to the injector itself, the injector won't need to work as hard or pulse as much because the pump is supplying more pressure per pulse. hope that makes sense.

[magnumP5]

it takes a load off your injectors. if you have less pressure on tap you'll need to add fuel by increasing duty cycle and pulsewidth. by having more flow to the injector itself, the injector won't need to work as hard or pulse as much because the pump is supplying more pressure per pulse. hope that makes sense.
I follow. I've just read through the pump install thread many times and a lot of people ran into lean issues for one reason or another. There was also recent word of odd "pulsing" noises with the Walboro when used in conjunction with the Perrin fuel rail. Either way, if it won't "hurt" at boost levels around 10 psi I see no harm in installing it. May just make that my weekend project.

[Outlawstar98]

Ken, do a GB ill be in. LOL

[nullbyte]

ah shit, I need one anyways. Do a GB and I'm down for sure!

[franciscoescn]

I need one to im in the gb if you do make one.

[KrayzieFox]

GB isn't a bad idea actually. Seems like there's quite a few of us that are in need of this upgrade. Ken, make it happen :)

[KZL_99ES]

i'd be down for one too!

[flaps720]

i just ordered one from pg a few days ago and want to get it in asap...is the install difficult for the average person (ive done all mods in sig on my own) or should it be done professionally? ive been under the back seat to disconnect and reconnect the electrical wires but thats it. Fuel lines kind of scare me more than bolt ons do...

[KrayzieFox]

The lines have quick disconnect clips, so don't be scared of them. I haven't done it myself, but I don't imagine it to be extremely difficult. Disconnect the electrical plugs and start the car then let it die. That will get rid of most of the fuel in the lines, then you can just use the quick disconnects and pull out the pump.

Looking at the manual it doesn't look like it's held in by much. I see the two fuel lines, and one bolt. It's probably more than that, but it doesn't look all that bad.

[Captain KRM P5]

GB isn't a bad idea actually. Seems like there's quite a few of us that are in need of this upgrade. Ken, make it happen :)

start a list!

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[JCell]

price?

[KrayzieFox]

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[Outlawstar98]

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Price prob. depends on how many people want one.

[gangstagangsta]

dont mean to thread jack(srry) But I went with a FMIC and a new ATP WGA now I am getting a fuel cut. Do you think that a new pump would help my problems? 68k on the car and I am sure it has the OEM fuel pump.

[JCell]

i doubt it....

how much psi are you running? whats your fuel pres at?

[gangstagangsta]

i doubt it....

how much psi are you running? whats your fuel pres at?

installing gauges this weekend.......

[Captain KRM P5]

dont mean to thread jack(srry) But I went with a FMIC and a new ATP WGA now I am getting a fuel cut. Do you think that a new pump would help my problems? 68k on the car and I am sure it has the OEM fuel pump.

i'm thinking this will help alot more

http://siteground207.com/~protegeg/product_info.php?products_id=866

[MREDDLE]

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[Deatschwerks]

thanks for chiming in mark :) if you guys place the order for the pump and injectors through me i'll take a percentage off for you as well.

No problem sir, Im always available for any help needed

[blkonblkMSP]

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I want in! depending on price

[dmention7]

Looking at getting in on this... maybe someone can push me over the edge (or tell me to STFU and stop cluttering the thread... lol)

I recently switched to an air-water IC setup, and ever since I've been tending to push lean at higher rpms like the OP, at least as indicated by a narrowband... though I'm throwing it on a dyno tomorrow. I haven't been able to get a clear idea of whether these pumps are prone to failing slowly. My gut tells me I'd probably be better off getting some tuning, but the idea of fixing the problem at a fraction of the price makes me want to double-check.

[KrayzieFox]

So I guess there's a How-To on this forum for this job, it's old.. but still here lol.

http://www.mazdas247.com/forum/showthread.php?p=273322#poststop

And Ken, do you know if this issue has been resolved with the pumps you sell? Do they come with a replacement piece or do we still have to use the stock one that's prone to failure under higher pressures?

http://www.mazdas247.com/forum/showthread.php?p=957522#poststop

[magnumP5]

^^^ I don't think there was ever an issue with the pumps Ken sells. It's just that as with the injector o-rings, there's the possibility that the fuel line o-ring can get torn during uninstall/install. It's highly unlikely these things are tearing due to pressure. If you're nervous, buy a new one and use that when you install the pump.

[SCMP3]

wish i could get in on this... i dont start my new job till monday and i have bills:(

[KrayzieFox]

So much for the group buy.. placed my order a couple minutes ago. Oh well, it was worth a try.

[SpeedAdiction20]

that's too bad, I just saw this, and would have been in if we could have gotten enough people for a decent price.. ill just wait I guess till sometime this summer for it, car's doin pretty good so far, but worth getting sometime soon, figured now would have been a good time with a GB... oh well

[KrayzieFox]

Hmm.. I think I might be joining the fuel pump upgrading bandwagon. Better stock up Ken.


they are in good supply right now

The comments for your order are

- ships on 5/15 due to out of stock issue
(nuts)(pissed)(pow)

[LinuxRacr]

A walboro is probably the first modification i would do in a turbo car. When it comes to tuning for more boost, even when your injectors are sufficient, the factory fuel pump can cause a lean condition that makes it look like your injectors are maxed out, when really its the fuel pump that cant keep up.

I think this is what is happening to me at higher RPMs.

[avarela86]

I think this is what is happening to me at higher RPMs.

You on the stock pump? I am.

[LinuxRacr]

Yeah, and I think I lean out in the upper RPM band.

[Cruzanspeed]

Is the problem around 5000rpm? If it is I have the same problem..

[avarela86]

Yeah, and I think I lean out in the upper RPM band.

If you decide to go with the meth kit you shouldn't need to worry more about leaning out, you'll have to instead pull back fuel on the injectors right? That's what im hoping for.

[LinuxRacr]

Is the problem around 5000rpm? If it is I have the same problem..

Yes. That's exactly when it starts.... no matter how much fuel I add. Also, if I compensate for this, by adding fuel there, it makes me too rich in the higher gears when I mash the throttle. I need to hook my fuel pressure gauge up again, so I can get the readout.

[LinuxRacr]

If you decide to go with the meth kit you shouldn't need to worry more about leaning out, you'll have to instead pull back fuel on the injectors right? That's what im hoping for.

I think that is one advantage of the Alky injection. You just have to make sure you have the right wideband to tune with (has Lamda readout).

[magnumP5]

I think that is one advantage of the Alky injection. You just have to make sure you have the right wideband to tune with (has Lamda readout).
Or just adjust air/fuel for gasoline to compensate... Unless you're running straight gas, methanol, etc. you're going to have to do some conversion with air/fuel ratios or lambda because they all have different stoichiometric ratios. Just saying, a wideband that outputs in lambda doesn't solve the problem, it just makes the conversion a little easier. I believe JDM Sam mentioned something along the lines of 11.9:1 being a good air/fuel ratio to shoot for for a 50/50 water/methanol injection setup.

[MS_Rick]

sub..

[KrayzieFox]

The comments for your order are

- ships on 5/15 due to out of stock issue
(nuts)(pissed)(pow)

Got the pump today.. thanks for the pleasant surprise Ken. 5/12 delivery pwns 5/15 shipment (2thumbs)

[dmention7]

I received my pump from PG today. I opened the box expecting to find the "complete fuel pump kit" including "all drop parts, accessories and installation instructions", and an "inlet filter that meets or exceeds original equipment specifications and provides improved filtration and durability." However, all that was there was a pump in a plastic bag and some paper wadding.

Am I to take it that this pump is a direct replacement for the stock pump, right down to the wiring harness, or is my "kit" missing parts?

[flaps720]

I received my pump from PG today. I opened the box expecting to find the "complete fuel pump kit" including "all drop parts, accessories and installation instructions", and an "inlet filter that meets or exceeds original equipment specifications and provides improved filtration and durability." However, all that was there was a pump in a plastic bag and some paper wadding.

Am I to take it that this pump is a direct replacement for the stock pump, right down to the wiring harness, or is my "kit" missing parts?

thats all your supposed to get, Ken from PG was supposed to change the description on the PG website, I had the same concern a month or two ago when I got mine and pm'd him to find out the deal. The walboro is almost a direct replacement...

The walboro is a bit taller than the stocker and will need a tiny bit of modification to the white cap that holds it in place, basically just a small section of the cap needs to be cut to allow the top of the pump to poke through and the bottom of the cap still "clip" in place. Theres a thread on it somewhere, maybe even in the how-to...

Just be really careful with the six screws accessing the pump, they strip easily, so be sure you have the exact phillips head and apply even steady pressure, also, since it didnt come with a "kit" be really careful taking off the filter and o-ring type pieces.

[flaps720]

http://www.mazdas247.com/forum/showthread.php?t=23731

Heres the thread showing what to do ^^

[dmention7]

Thanks for the reply. I really wish I had known that I was only purchasing the pump, since I could've got it for $30 cheaper from almost anywhere else.

[flaps720]

I brought that point up to him as well, just message him and you guys will work something out!

[LinuxRacr]

Those who have switched to the Walbro pump, what have you noticed as your highest fuel pressure?