Thread: 2014 diesel Hilux slow starting & loosing fuel prime.

govt solution would be just say there's nothing wrong with it even if there obviously is

OK I’ve got a fair amount of experience with the 1KD having run fleets >100 back in the day.

I would like to know the following:

1. Mileage
2. Reason why the injectors were replaced
3. As close to the exact service history regarding fuel filters as you can provide

Flyblown 1/ 350k
2/ starting to rattle/Knock
3/ Has water trap pre filter Fuel filter replaced about 6000 km ago. I think they were previously changed every second service. Would have to check.
Done maybe 200 km since injectors.

sounds like fuel is leaking back overnight = hard to start and keep running because there's air in the system from somewhere had this on my 98 isuzu and a td4 land rover freelander

OK, longshot but you never know.

What are you are describing are the symptoms of a classic air-leak related to the filters. I've had it with mine when the fuel filters / lines have been apart, had it on work utes at the mines lots of times. Pretty much every time its been one of the o-rings in the pre-filter. More often than not the one between the glass bowl and the filter canister. If you’ve got a Fuel Manager filter then those o-rings are notorious for cracking or breaking when tightening and not forming a proper seal. They crack because they are often made from rubber that isn’t fuel tolerant. You’re supposed to get new nitrile / NBR o-rings every time that filter comes apart, but more often than not guys use the old one or they replace it with one that isn’t fuel tolerant. Even Western Filters don’t supply the proper ones.

There’s also one on the bottom drain plug, if that is stuffed (or missing altogether- very easy to drop them without realising, especially that bottom one on the tap) then you will be sucking air.

It doesn’t take much of a leak to cause this problem. I had a dose of bad fuel in January that I posted about on here - that farkin’ seal messed me around after I drained the filter. Because I didn’t have a packet of new seals with me I tried to use the old O-ring and it broke so I ended up making a seal out of a piece of old innertube from the tyre shop in Otorohanga! Worked!

If the pump hasn’t been touched (just the injectors replaced) then I would avoid going anywhere near the pump until you have been through it all again. I’d check those o-rings really really carefully and replace them with nitrile ones. I got mine from Seal Imports in Penrose.

Good advice there FB.

Thanks , we had checked because filter related air leaks was first thought but sounds like it's worth revisiting if they haven't found anything.

Also fuel hose connections, hard pipe near mounting points etc etc. It's often surprising where these things fail - and it's an utter pain in the arse when they do as the volume of the piping is so small a little hole can allow a LOT of movement of fuel back to the tank in a very short time leading to all sorts of bollocks performance and running issues. It can often be a push in the wrong part of a hose unseating it just enough to break the seal if the rubber of the hose has compressed and taken a set.

Sometimes it's related to work, other times it's purely coincidental for timing and a stray rock or the like has bounced up somewhere and clipped a line under the chassis etc. They can be a bastard to find, as these can hold under pressure but not vacuum or vice versa. Used to have the hells own time chasing these down in marine installations, as half the time the bloody pipework isn't accessible so you end up having to reroute pipework which on commercial boats is an utter nightmare.

how did you get on with this

Waiting to hear for sure.
So far have
1/ substituted a complete filter unit that was available. Off later model so electrics not compatabile . Seemed to fix.
2/ Fitted earlier filter top to my base. No change. Their interchangeable.
3/ Fitted complete early unit which now has injector return going directly to tank. AS standard on earlier KUN's Seems to be working ok.
Will know for sure after weekend.

My unit had return plumbed to in side of filter.
Seemed to be affecting pumps ability to draw fuel from tank. Didn't seem to affect the first ( later) unit which has same set
up.
So we'll see what monday brings.
Correct filter unit for my year is pricey The earlier one much cheaper.

All scanned sensors were fine with correct rail pressures etc. Only fault shown was for starting.
So maybe air leak somewhere in filter assembly ?
It has done 350k . :-/

Originally Posted by blip

Big hammer and big wallet for land rover

And big oil drip pan

A lot of the pesky fuel system issues just throw a generic code or none at all. Unfortunately for the modern mechanics that swap the parts the computer tells them to, the diesel fuel system still requires the odd bit of diagnostic work. What might work if you are still having faults is fit a clear hose between the injection pump and the filter which a high point at each end and a low point in the middle and leave it overnight. You'll see air bubbles if the leak is in that area and whichever end will hopefully tell you where from. A piece of clear hose between the tank supply and the filter with a high point in it will do the same.

Can you please check your pre filter, especially if it is a fuel manager type, Donaldson are bad for air leaks have had a couple that have done this, also won’t leak fuel just suck air
And if this filter was not done with injector job I would find another shop

Thanks for all the inputs.
So far no news apart from it started fine monday morning.
They were intending to check the spill rail crush washers in case one had packed a sad when being fitted.
They're single use so will all be replaced.
Apparently usual symptoms are diesel in oil which doesn't seem to be happening.

The pre filter is actually a water trap.
Main filter may have been done when injectors done , I'd have to check.
I think the invoice is in the ute.
In town tomorrow so will see whats happening.