crfan replied:

Pretty sure you are getting air into the fuel line (tiny amount) most often it is from the fuel lines going to and coming from the fuel filter/s or the O ring at the bottom of the filter.
Try changint the spring clips to worm clamps and replace the O ring on the bottom of the filter.
Hope this helps..

Member - Ken replied:

Rob.
This is just a suggestion.

My 1HZ has an in line filter between the tank/s and the main filters.

Some dude put it in before I bought it and it was brought to my attention by a young, keen, service tech many moons and services after I bought.

He was quite excited that he had found it and took the trouble to put it on the hoist to show me.

It was one of those little plastic one way petrol type thingy's. Full of all sorts of crap including wood chips.

He reckons it was near the 'death knell' and would have caused fuel type problems 'very soon'.

Anyway the vehicle gets a new one of those every time now.

Its just a thought and something else for you to check.

Mine is located halfway lalong the drivers side chassis rail in behind other hoses and electrical conduits that have tied to the fuel pipes. Its hard to see unless you know where to look.

Regards

Ken Robinson

mijochka replied:

Rob.
Whilst I see you're sure your fuel is clean, I have to say that the symptoms are EXACTLY what I experienced with my 12 HT and eventually diagnosed as algae in fuel. Fooled a couple of very competent diesel mechanics to the point where a lift pump was replaced unneccessarily.Particles were being drawn into the gauze filter on the pickup, the motor would die, thereby releasing the suction, particles fall away and motor runs until cycle repeats itself. Totally random,totally unpredictable and totally frustrating! The fact that your motor sat idle may be significant, as this is the environment which promotes algae growth. Might be worth checking.
Mick

Member - Pesty (SA) replied:

Just a suggestion I had a similar problem with petrol cruiser and eventually found faulty elec. connection on fuel cutout.
Try bypassing all electical circuits for fuel solenoid.
If you have a faulty connection that is building resistance then cuts out, and reconnects when you pull up after a couple of minutes as it cools.
Just a thought.
Roachie had a problem with too many filters on the patrol and I will get him to come on and explain. Only relates if you have added filters.

Peter 2 replied:

Hot start probs can be due to worn injection pump, a friend had to replace his due to similar probs to you.
I'd be draining and flushing the whole fuel system to remove possibility of loose stuff blocking fuel pickup.
Some 1 HZ's have a gauze filter on the inlet side of the injection pump, it could have something blocking it intermittently too.
Is the fuel tank breather system clear and free of obstructions (like mud wasps), symptons could point to a vacuum in the tank/s leading to fuel starvation. Which tank are you running on when it happens?
Leave the cap loose for while to see if it still happens is the easiest way to prove the vacuum problem.

Member - Ken replied:

Hey Rob

Have you figured out what it is that is causing the problem yet.

Ken Robinson

zoran replied:

Rob, On a couple of occasions Ive found debris lurking between the banjo and banjo bolts on diesel fuel systems. This debris can at any time restrict fuel flow and often occurs intermittently. I suggest you start at the injection pump and remove every banjo bolt and inspect the pipes & banjos for cleanliness.Work your way back to the fuel tank. Use compressed air to blowout your fuel lines & fittings. Pay particular attention to any strainers that may be positioned in the banjos or banjo bolts, and always service your fuel filters. Regards, Zoran.