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Old 08-02-2010, 05:57 PM   #1
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Default installing walbro

Is it easy as hell/as easy to do on a miata as other cars?

I remember in my subaru's you'd just unbolt the assembly that held the pump in the tank from the top, unscrew 1 screw, pull out and replace and re-install. Easy and ridiculously simple.

I searched around and can't find a step by step or writeup. Probably not looking in the right places, but I tried teh search here and garage section of m.net. Can't really find anything specific to fuel pump installation.


How do you get to it in an NB? I assume its under the shelf that holds the soft top? Is there a little trap door/whatever you wanna call it?


Pardon my noobish questions, but I've gotten away with using the stock pump for all this time, but with e85 I'm finally in need for something more adequate
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Old 08-02-2010, 06:08 PM   #2
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Yep, remove the parcel shelf. I havent done the swap myself but have read about it and its no different than any other fuel pump upgrade

Although I hate walbro pumps and think they suck. I'de personally recommend a supra or z fuel pump, higher quality and more reliable.
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Old 08-02-2010, 06:08 PM   #3
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Yes their is a panel to remove, and it should be as easy as any other car. Haven't done it myself, but I don't see why not. I have seen the top of the tank and it looks normal.
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Old 08-02-2010, 06:12 PM   #4
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cool beans. thanx
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Old 08-02-2010, 06:18 PM   #5
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Walbro isn't adequate for E85. You can get away with it but there are lots and lots of documented E85+walbro failures out there. I'm going to look at a Bosch 044 or something else.
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Old 08-02-2010, 06:59 PM   #6
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oh ****...
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Old 08-02-2010, 07:00 PM   #7
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Its easy to do, just be careful with the fuel lines. They like to spring back and blast your face with gas.
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Old 08-02-2010, 07:15 PM   #8
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I've been using a Walbro intank pump for 2 years with e85. Plenty of DSMers using them with no bad side effects, and we recommend/install them at the shop. Not saying they don't fail, but they seem to be as reliable as any other, albeit louder. And while a Bosch 044 would probably be the last pump you'd ever need WRT flow capacity, we've seen them fail, too.
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Old 08-02-2010, 07:29 PM   #9
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Here:

Run tank dry or close enough (not really necessary)
park car
turn off car
open gas tank cap
disconnect battery
rip off that ******* carpeting on the parcel shelf
unscrew stupid metal panel. there's only one on the shelf
grab your fuel line disconnect tool (dumb plastic thing)
shove it in fuel line quick disconnect clip
wrap rag around line
unpluggasaurus the fuel linez
unscrew fuel line lid
lift ******* assembly out
rip old pump off
suck some dicks
rip lil fuel line filter lameass sock off
attach new pump
attach lameass sock to new pump
crimp on new wirez
light cigarette
screw all them lid bitches back on

being that you are e85'ing you may want to **** with your in tank regulator or something. Remove? Replace? I need that info myself..
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Old 08-02-2010, 07:36 PM   #10
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Thanx.
Just so I don't mess this up, how many dicks should I suck?
And when I'm done with the cigarette do I just chuck it into the tank?
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Old 08-02-2010, 07:51 PM   #11
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Quote:
Originally Posted by Aricjm15 View Post
Its easy to do, just be careful with the fuel lines. They like to spring back and blast your face with gas.
This is very true. I just replaced the pump on my buddies 02se and it was a quick 1 hour job. But, be kind to yourself and lay a bunch of paper towels or rags around the opening, it's very easy to make a mess when you remove the lines and move them around.

Also Sav in right about E85 and the Whally, same thing happens to my friends E30 a few months ago when he made the switch.
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Old 08-02-2010, 08:15 PM   #12
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Quote:
Originally Posted by matthewdesigns View Post
I've been using a Walbro intank pump for 2 years with e85. Plenty of DSMers using them with no bad side effects, and we recommend/install them at the shop. Not saying they don't fail, but they seem to be as reliable as any other, albeit louder. And while a Bosch 044 would probably be the last pump you'd ever need WRT flow capacity, we've seen them fail, too.
do a side-by-side...

turn a walbro pump on and it sounds like ****, gargles...

turn a supra or Z pump on and you hear a nice solid sound.
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Old 08-02-2010, 08:59 PM   #13
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No argument there, Walbros definitely sound annoying. I don't have any personal experience with the other pumps, but if they are both Denso then I'm sure they are nice and quiet and are just as reliable.

What does the Z pump flow? I know the Supra is 260lph which is enough for e85 and 450ish hp.
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Old 08-02-2010, 09:04 PM   #14
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I already have a 255 HP so that's what's going in.
if it takes a **** or whatnot I'll definitely replace it with a bosch.
I wouldn't even begin to know where to start looking for a supra/Z pump. around here those are rare.
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Old 08-02-2010, 09:29 PM   #15
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A possible failed fuel pump won't possibly damage your engine when it goes? If it's a given, I'm not sure I'd risk it. Sell the walbro while you still haven't installed it and get something that'll work.
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Old 08-02-2010, 10:48 PM   #16
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I've a whole lot of friends using walbros on evo's/subaru's and other vehicles with e85 with no problems. Just like with the chinacharger, I think there's a certain risk involved.

I'll bet the bosch is much more expensive too. Or am I wrong?
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Old 08-02-2010, 11:32 PM   #17
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I like to think it's better to do it right the first time.
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Old 08-02-2010, 11:47 PM   #18
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Ive been reading thread after thread about this today and yesterday, and haven't found anyone with a documented walbro fuel pump failure due to e85. I mean if its a FACT that I'll break it and there's info to prove it I'll definitely take the safe route, but.....

Reading a thread on NASIOC where people reported using e85 successfully with walbro for over 1 year there are posts of walbro representatives saying "its not designed to be used with ethanol, but we are unsure of whether it will break them or not" or something along those lines.

Also they did a study where a bunch of people using e85 for long periods of time on their walbro were offered new pumps for free if they sent in their old ones for walbro to take em apart and see what the damaging effects, if any, e85 had on them. Looking for the results of that now.
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Old 08-03-2010, 12:02 AM   #19
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i dont know much about e85 causing problems or not, i'm just going by what ive gathered from customers and other shops, as well as my direct experience with the walbro pumps. i think they're cost-cut alternatives to real (oe) pumps.

reality is, use the damn thing and if it breaks, replace it with another or better.

one thing to be sure to do, which most people neglect to do, is run heavy gauge wiring to your pump.. sufficient of powering it. i'de suggest running a relay setup with ~14ga wire direct to the pump. you'll obviously need a larger fuse to match for the increased current draw and heavier gauge wiring.

good luck
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Old 08-03-2010, 12:11 AM   #20
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I also have been researching and decided to go with the Bosch. I needed a bigger pump for E85 anyways and went for the best (imho).

One thing I ran across while researching is that there are a lot of fake Walbros out there (Bosch too). Many of the failures I have read about were due to being fakes.

Another reason I went for the Bosch is that it flows more than the Walbro at higher pressures.

--Ferdi
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