Jump to content
SAU Community

Recommended Posts

Hi Fellow Wagoners

I just installed a new fuel pump a Walbro 255l and all went together fine except Now when i first take off or put my foot down in any gear it seems like the fuel pump is struggling for a second then off we go,,,,,,,

i noticed after it was all done and installed that everyone is direct wiring them will this fix my problem......Or is this a different problem like the ecu cant work out whats going on with the new pump .

I did try and search for this but came up with nothing other than you should directly wire the fuel pump to get the max out of your new pump...

Any help would be much appreciated...

Cheers

Link to comment
https://www.sau.com.au/forums/topic/411684-small-fuel-pump-issue/
Share on other sites

Yeah I'm to sure what's going on I might have to pull it back out and check all the hoses make sure there is no splits or anything but its almost like there isn't enough power voltage for the first surge of fuel then it catches up....

I read the thread title & thought your issue was with a small fuel pump & that maybe a larger fuel pump would fix it. Then I read you already had a 255L Wallbro.. mmm, I get it.

Reminds me of the time the radio lost & found announced: "Lost, a large brown lady's handbag". I always wondered that had they'd given a description of the handbag, then the large brown lady would stand a better chance of getting it back.

:)

I read the thread title & thought your issue was with a small fuel pump & that maybe a larger fuel pump would fix it. Then I read you already had a 255L Wallbro.. mmm, I get it.

Reminds me of the time the radio lost & found announced: "Lost, a large brown lady's handbag". I always wondered that had they'd given a description of the handbag, then the large brown lady would stand a better chance of getting it back.

:)

haha very true thanks for the interest though........i'm going to hard wire it this weekend then Nistune time finally.....

Lol at the dangling modifier examples.

If you only changed fuel pumps, and not fuel pressure regulator, then you shouldn't have any issues - car should run just as before. I have the Walbro GSS341 as well (the 255l/h pump) and have never bothered to hard-wire it. Made no difference to the tune when installed. It has been running on a Nistune tune with a higher fuel pressure and larger injectors for a couple of years now without issues.

Lol at the dangling modifier examples.

If you only changed fuel pumps, and not fuel pressure regulator, then you shouldn't have any issues - car should run just as before. I have the Walbro GSS341 as well (the 255l/h pump) and have never bothered to hard-wire it. Made no difference to the tune when installed. It has been running on a Nistune tune with a higher fuel pressure and larger injectors for a couple of years now without issues.

I have seen it affect the tune many times, although other times it is fine. Just because you had no issues doesn't mean everyone will be fine, your car may have even been modified in Japan.

The Walbro's are usually problematic which is why I suggest hard wiring them, as that rules out any issues.

I hard wired the pump on Sunday and has fixed the problem........for the $50 worth of parts and 1h of my time well worth doing ......

Only thing when doing the mod was making sure you cut the right wires and put the right wire in the right spot on the Relay other than that pretty easy to do.......

Just keep a couple of spare Fuses in the car and your all good...

In case anyone else is interested in doing this mod the 2 wires leading to the fuel pump were Black /yellow + and purple -....there were 5 wires going to the top of the fuel tank the 2 pin plug is the one going to the fuel pump and those 2 wires were thicker than the rest so made sense.....

thanks for your help people......

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Well the install is officially done. Filled with fluid and bled it today, but didn't get a chance to take it on a test drive. I'll throw some final pics of the lines and whatnot but you can definitely install a DMAX rack in an R33 with pretty minor mods. I think the only other thing I had to do that isn't documented here is grind a bit of the larger banjo fitting to get it to clear since the banjos are grouped much tighter on the DMAX rack. Also the dust boots from a R33 do not fit either fyi, so if you end up doing this install for whatever reason you'll need to grab those too. One caveat with buying the S15 dust boots however is that the clamps are too small to fit on the R33 inner tie rod since they're much thicker so keep the old clamps around. The boots also twist a bit when adjusting toe but it's not a big deal. No issues or leaks so far, steering feels good and it looks like there's a bit more lock now than I had before. Getting an alignment on Saturday so I'll see how it feels then but seems like it'll be good to go       
    • I don't get in here much anymore but I can help you with this.   The hole is a vent (air relief) for the brake proportioning valve, which is built into the master cylinder.    The bad news is that if brake fluid is leaking from that hole then it's getting past the proportioning valve seals.   The really bad news is that no spare parts are available for the proportioning valve either from Nissan or after market.     It's a bit of a PITA getting the proportioning valve out of the master cylinder body anyway but, fortunately, leaks from that area are rare in my experience. BTW, if those are copper (as such) brake lines you should get rid of them.    Bundy (steel) tube is a far better choice (and legal  in Australia - if that's where you are).
    • EMU Classic. For what I need it to do I see no reason to upgrade. Link and Haltech would both cost an extra chunk of money for a lot of unutilized features
×
×
  • Create New...