G'day, I noticed that my current VRX and the ones I had previously, suffer something in common. Fuel supply interruption at certain driving conditions eg going for a "spirited" cruise through the hills.
I'm keen to upgrade the fuel pump and I know its that the fuel pump is in the tank with the fuel gauge sensor attached in the same assembly (according to the workshop manual).
Could any one with experience in a recent upgrade to fuel pump in TH-TJ model share some tips please?

1. What brand and model/ specification did you use?
3. Did you notice the difference?
5. Is fuel ecomony affected?
and any other advice you would like to share...

I know, lotsa q's but all help appreciated. :-)
cheers
PS There's no 2 and 4 :-)

Walbro GS3442 is the most common aftermarket pump used.Staight swap with the original and rated to 500HP.Only downside is they a pretty noisy over a STD pump.

G'day, I noticed that my current VRX and the ones I had previously, suffer something in common. Fuel supply interruption at certain driving conditions eg going for a "spirited" cruise through the hills.
By this do you mean momentary fuel starvation when going around corners with low fuel in the tank?
If yes then a high flow fuel pump won't solve your problem.
Have you had your fuel injectors ultrasonically cleaned?
Changed the fuel filter?
I would look at all these first if you haven't already.

But yeh Walbro GS3442 is the one to go for.
I have one in my car and yes it does get noisy when hot (http://www.youtube.com/watch?v=0GnSTq4-xm8).

a few comments...

your fuel pump likely isn't the cause of your fueling issues during spirited driving. the magna fuel pickup is directed towards the left hand side of the tank, so when you take high speed right hand bends, fuel is moved away from the pickup and typically you get some intermittant starvation issues.

in regards to the fuel pump, the best replacement is a Walbro GS 342 (255L/hr, rated at 500hp). it doesn't quite bolt straight in, but with minimal work you can get it to fit nicely. the electrics stay the same, I just had to trim a bit off the bracket to make it fit.

I haven't had starvation issues for a long time, but I believe that's more to do with knowing the issue with the pickup than the fuel pump having fixed it.

no noticeable difference in fuel economy either.

one tip to take note of is to release the pressure in the tank BEFORE you remove the feed hose from the pickup. this will save you the hassle of dealing with fuel in the cabin because the hose was still pressurised.

cheers,
.wook

Would a surge tank overcome the pickup problem?

in regards to the fuel pump, the best replacement is a Walbro GS 342 (255L/hr, rated at 500hp). it doesn't quite bolt straight in, but with minimal work you can get it to fit nicely. the electrics stay the same, I just had to trim a bit off the bracket to make it fit.



I didn't have to trim anything to make mine fit.Straight swap over.

My experiences when working on other people's cars.

Walbro - good pumps, though, very loud (especially when mounted externally)

Depending on the current draw compared to a stock pump (and what diameter the stock fuel pump wiring is) upgrading wiring should seriouslly be looked at.

P.S Wookie - if the pick up is on the LHS of the car, and you take a right hand corner - wouldnt the fuel be on the left hand side of the tank near the pickup?

Also - as Mohit has said - a bigger fuel pump may not be the right way to go. A surge tank is a better solution.

yes, a surge tank would eliminate the starvation problem. would probably only need to be 500ml or so.

my bracket was too short. we ended up cutting about 3mm off the metal line that the pump feeds. it's covered by the hose anyway, so it wasn't a huge deal. I'm just saying mine wasn't quite "bolt straight in."

the pickup is in the middle of the tank, but is pointed to the left hand side of the car. when you take a right hand corner the fuel moves to the left hand side of the tank and is drawn away from the pickup. it's hard to describe, but if you ever take the pump/sender unit out, you'll see what I'm talking about.

cheers,
.wook

Well, I am having the same problems as well. Even with 15L in the tank. No problems when tank is full. Is there a surge tank kit?

dont the ralliarts have a baffeled tank to help with this?

Thanks for your input all...