fuel delivery issue?

[Vern]

Seem to have a bit of an issue, but haven't really had much of a chance to look at it yet.

On Friday I took the rangie to get weighed, on the way there it started to breakdown, was like it was starving for fuel and running rather rough. So it did this about 6 times over the 50k trip. Funny thing was, it did it whilst cruising at around 100, but not under load.
So after a few minutes or around 500m it would come good again.

So I got it home, wound the fuel screw out a bit more (from 2.5 turns to 3.5 turns) as it seemed like it needed more fuel in the top end anyway.

Then I had to do another trip in the arvo (same trip), it only did it twice this time, both whilst coasting at around 100.
Thought I'd do the last 15 through the bush, it ran flawless through there, must have been as I was up and down gears a bit, even went well up some biggish hills.

Anyone know where I should start looking?:(

[Ancient Mariner]

Seem to have a bit of an issue, but haven't really had much of a chance to look at it yet.

On Friday I took the rangie to get weighed, on the way there it started to breakdown, was like it was starving for fuel and running rather rough. So it did this about 6 times over the 50k trip. Funny thing was, it did it whilst cruising at around 100, but not under load.
So after a few minutes or around 500m it would come good again.

So I got it home, wound the fuel screw out a bit more (from 2.5 turns to 3.5 turns) as it seemed like it needed more fuel in the top end anyway.

Then I had to do another trip in the arvo (same trip), it only did it twice this time, both whilst coasting at around 100.
Thought I'd do the last 15 through the bush, it ran flawless through there, must have been as I was up and down gears a bit, even went well up some biggish hills.

Anyone know where I should start looking?:(
That tricky gauze filter on the pump

Noel

[Bearman]

First thing to check would be the small mesh filter under the banjo bolt on the pump and second would be the mesh sock on the fuel pickup inside the tank. That's if your normal filter/s have been recently changed.

[Vern]

Sorry forgot to say, that was the first thing I checked, clean as a whistle. Main filter is new as well. Didn't check rear filter though (inline petrol job)
Filter sock in the tank was clean when I removed the old fuel pump. Unless its picked up a lot of rubbish in say the 15km since it was done

[Ancient Mariner]

Tank breather or air leak

[Vern]

Tank breather
Could be this, as I said, will run great for about 5k, then breakdown, then come good again for another 5k or so. But doesn't do it when giving it a bit of stick.

[isuzurover]

I had a similar problem once, the hand primer had unscrewed itself and popped up and was letting air in - I think it was on the way out.

An air leak on a filter will do the same.

[Vern]

Will go over it all when I get some spare time. Cheers

[Dougal]

Can you pressurise the fuel lines? I had a leak once that would let air in, but not let any fuel out. Once I pressurised the lines it was obvious.

[landiematt]

Fuel cap blocked. When playing up remove cap and listen for air getting sucked in.
Matt

[Vern]

Pretty sure I found it, my fuel return return line from the injectors back to the filter broke, so I joined it with some rubber hose, just guessing it was sucking in air there. Not sure how I'm going to fix it better

[Bearman]

Pretty sure I found it, my fuel return return line from the injectors back to the filter broke, so I joined it with some rubber hose, just guessing it was sucking in air there. Not sure how I'm going to fix it better

Either a new return line or leave the rubber hose there - that should help the vibration issue which causes the return line to crack.:D

[Vern]

Yeah I need to find a better 4mm hose, its just a piece of silicon hose which is quite soft.

[Vern]

Well this is still happening, grrrr. Better stick it on the hoist tonight I think

[Vern]

Could it be fuel pump?

[isuzurover]

Possible. The primer also fails and starts sucking in air.

[Dougal]

Engine off, pressurise the whole fuel lines and see what leaks.

[Vern]

I think its a fuel blockage, it started to die at exactly the same spots as last time I travelled the same route. Although on the way home it stopped completely, like it was out of fuel, kept trying to start it but nothing, after a few minutes it started to chug a bit, then fired up, was rough for a while then came good, sat pretty close to the governor for the last 2 k's home.
It will go good for a few k's then start to chug like its running out of fuel, so I wait a while (I think for it to fill up the filter bowl again) then off I go again. Goes better when flogging it (sucking fuel through harder??).


Anyway, will get the bars back on then stick it on the hoist and pull some bits off.

[Dougal]

I think its a fuel blockage, it started to die at exactly the same spots as last time I travelled the same route. Although on the way home it stopped completely, like it was out of fuel, kept trying to start it but nothing, after a few minutes it started to chug a bit, then fired up, was rough for a while then came good, sat pretty close to the governor for the last 2 k's home.
It will go good for a few k's then start to chug like its running out of fuel, so I wait a while (I think for it to fill up the filter bowl again) then off I go again. Goes better when flogging it (sucking fuel through harder??).


Anyway, will get the bars back on then stick it on the hoist and pull some bits off.

Sounds like a block. An air leak leaves you pumping the feed pump for a few minutes every time it stops.

[Vern]

Removed the rear filter (petrol cylinder type one at rear wheel arch) , looked a bit manky inside, so grabbed a punch and put a hole through it, will see how this goes tomorrow.

[isuzurover]

Removed the rear filter (petrol cylinder type one at rear wheel arch) , looked a bit manky inside, so grabbed a punch and put a hole through it, will see how this goes tomorrow.

Petrol fuel filters have no place on a diesel.

[Vern]

Yeah I forgot it was there

[rar110]

I use an in line filter as a screen before the lift pump. It's worked ok. However I will fit a Racor/Baldwin spin on filter it its place eventually.

[Vern]

All fixed, goes much better now. Although, I wound the fuel back to only 4 turns out, and thought I wound the boost back, but noticed I was going off the dial on a 30psi gauge:eek:. So to make I sure I get it right, which way should I wind the actuator rod to decrease boost?

[Dougal]

All fixed, goes much better now. Although, I wound the fuel back to only 4 turns out, and thought I wound the boost back, but noticed I was going off the dial on a 30psi gauge:eek:. So to make I sure I get it right, which way should I wind the actuator rod to decrease boost?

Sounds like it's now behaving.
Lengthen the actuator rod to decrease boost. Boost does of course depend on fuel so expect a bit of back and forward between the two before it does what it should.

[Shingleback]

All fixed, goes much better now. Although, I wound the fuel back to only 4 turns out, and thought I wound the boost back, but noticed I was going off the dial on a 30psi gauge:eek:. So to make I sure I get it right, which way should I wind the actuator rod to decrease boost?

If the boost has gone up since you played with it, just wind it the other way to decrease boost, to state the obvious? Sorry if i've missed something.

Anyway, how does the new turbo perform compered to your old GT2260?

Cheers,

Andrew.

[Vern]

Yeah I couldn't remember which way I wound it🍺.

The gt2260 felt more punchy, this feels smoother if that makes sense? Power feels similar