Jump to content
SAU Community

Fuel pressure questions

mabru

By mabru,
in Engines & Forced Induction

 Share

Recommended Posts

mabru Enthusiast

mabru

Posted
Posted

My RB25DET has an adjustable FPR on it and a walbro fuel pump. I've noticed a loss of power throughout the rev range lately. I checked all the sensors, checked base timing, put brand new iridiums in it, and I'm running splitfire coilpacks. I checked the fuel pressure at idle with and without vacuum and they seem ok.

Sometimes while I'm watching the fuel pressure gauge I'll see it dip a few PSI slowly but surely and occasionally I have to readjust the FPR to compensate. I've done a few of these adjustments in the last few days. Basically what I'm wondering is if my fuel pump is on it's way out?

-Matt

Link to comment
https://www.sau.com.au/forums/topic/71228-fuel-pressure-questions/
Share on other sites
paulr33 Grand Master

paulr33

Posted
Posted

i recall seeing a few threads covering the walbro pressure levels and how much they pump. on skyline wiring it only gets 12volts, and its pressure levels and pump per/hour levels etc are based on 15volts (such as in supra im pretty sure). do a search on walbro 15volts and you should find it, may be causing your problem

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Get rid of the walbro.

They are a lard of junk once you push on them. Ok if you running it as a lifter pump for a surge tank, with a big bosch after that... then you wont notice the problem like i will be doing.

I was far from happy with my walbro, so it was more cost efffective to do a surge tank/bosch/walbro as a lifter setup than throw away some $$$

As for an FPR, you shouldnt really be using one anyway. There is no need

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • The Bogan
      NC MX5

      By The Bogan · Posted

      Maine Coone, did look at but to big and fluffy As for performance dogs, we had Mals at work, performance dogs are fun to watch, but, way to much work for this old rooster
    • sonicii
      Who has a Infiniti Q60, Q50 (V37)?

      By sonicii · Posted

      Yep, it was only an option on the Q50 Hybrid.  Same in Japan as far as I know. And doesn't use a centre diff like the Suby's do, so not the same as the WRX.  But it also isn't a reactive AWD like other Nissan AWD vehicles are, eg. Murano/Xtrail/etc.
    • MBS206
      NC MX5

      By MBS206 · Posted

      You should have got a Maine Coone then. Only thing is they're big. But so cool, and just like a dog. Or, just get yourself a high performance dog. That'll teach you for wanting Parkour indoors 😛
    • MBS206
      UniClutch

      By MBS206 · Posted

      Are you thinking of Bens R32? I don't remember if his went through the bonnet itself, but it went through the chassis rail. Brad (RISKIN) bought it, and turned it into a track car. It's funny how anti people are of Jim Berry now. I remember when I pulled mine out (during an engine change) and inspected it and found it cracking badly. At that point in time so many people were even on SAU, were so pro Jim Berry, and that was after Bens GTR exploded his quite publically.
    • The Bogan
      NC MX5

      By The Bogan · Posted

      That's one of the reasons I got that breed, they look weird, the other reasons are they small, they are very vocal, and run around like they are on crack, I didn't want a breed that just sits around, these two are like kids on red cordial  My daughter has one, and it's a laugh riot, constantly doing Parkour around the house, sits on her shoulder, plays catch, and constantly runs around the house taking turns chasing the dog around, her Bermese though, just lays around with constant bitch face, and just looks on in utter disgust at the cat and dog playing together 
×
×
  • Create New...