Question for the Td5 Gurus.

[Killer]

Driving along at cruising speed my Td5 defender has an intermitant problem where it starts to misfire and lose power, when I pull over the engine stalls. If I go through the fuel priming sequence the engine starts again (after a lot of cranking) and runs fine after that, sometimes for only a kilometre or so, other times it will keep going. When the engine starts it sometimes (around 50% of the time) blows out plumes of blue to white smoke which has a heavy smell of unburnt diesel. I have had this problem very sparodically since owning the vehicle last April, but yesterday it had the problem almost non stop from Narrabri to Ipswich. I had filled it with fuel at Coonabarabran, (about 100kms before Narrabri) and stopped overnight at Narrabri. Can anyone enlighten me on what the problem may be?

Thanks in advance, Mick.

[Col.Coleman]

Do you run a fuel conditioner like Chemtech?

Give it a gutfull of this and then change the fuel filter element. See what happens then.

Has the injector harness been rectified? Check.

CC

[Killer]

No CC I don't run a fuel conditioner, will give it a try, fuel filter was changed before I started the trip, about 4000kms ago. Injector harness was replaced about a year ago, MR gave it their sealing treatment, I have not checked it lately.

Cheers, Mick.

[Redback]

First thing I'd check is oil in the injector harness, pull the ECU out and check for oil on the ECU plugs, also have a look in the housing of the fuel filter, sometimes the Oring from the old filter can get stuck up there, this will cause an air gap and it will suck air causing the miss.

Baz.

[Col.Coleman]

If MR did the harness then that is a perm fix to THAT prob.

The question with the filter and conditioner is in regard to algae. Mine sat for a month without conditioner and on restart the filter got clogged and it wouldn't run. The fuel pump would actually stop but the car would continue to idle until the fuel pressure dropped and it would cut back in again.

Is your fuel pump cycling properly?

Does it happen primarily in the cold?

By discription it sounds like either fuel starvation a crook injector or the brain driving them.

Eliminate the cheap simple stuff first like flow and quality and progress on from there.

Do you have a nanocom?

CC

[Killer]

The thought of alge in the tank was something that I thought may be a possibility, would the conditioner get rid of that or would it be better to drop the tank and clean it out? I think the fuel pump is cycling okay, it hums when ignition is turned on, changes pitch after about 10 seconds, and cuts out after about 30-40 seconds. The problem doesn't seem to be related to the cold. I have a Nanocom, but am a novice with the use of it.

Cheers, Mick.

[Psimpson7]

If MR did the harness then that is a perm fix to THAT prob.



Unfortunately swapping the Injector harness isn't a permenant fix CC. It will need doing again at some point.

Mick I can bring my Nanocom to the pub meet on thursday if you want to try and read any codes again?

[Killer]

Pete I had a Nanocom on it yesterday, the only current code on it was a Tacho log fault, which if I recall correctly it had when we had your Nanocom plugged in.

Cheers, Mick.

[Psimpson7]

Hi Mick,

Yep I remember there wasn't much of any consequence logged.

frustrating...!

Rgds
Pete

[Blknight.aus]

grab you nanocom and head round, I'll dose your tank with biocide then you can top it off on the way home.

[Col.Coleman]

Unfortunately swapping the Injector harness isn't a permenant fix CC. It will need doing again at some point.


It is my understanding, MR don't just swap out the harnesses, the new ones are modified by the wires being resin filled into a plug to stop the progression of oil along the harness, and a perm fix.

Looks like I will still have to keep an eye on it:(

CC

[Blknight.aus]

the solution on the MR harness is having the head of the injector plug removed, filled with a sealastic and the having the cap put back on forcing the sealastic to extrude along the wires sealing the plug.

so far I havent had first hand experience of one of these harnesses not doing its thing.

[Killer]

It is my understanding, MR don't just swap out the harnesses, the new ones are modified by the wires being resin filled into a plug to stop the progression of oil along the harness, and a perm fix.

Looks like I will still have to keep an eye on it:(

CC

Yes MR fill the plug with a silicone substance of some sort so the oil doesn't make its way down the wires. They certainly seem to think it is a permanent fix, I have not heard of anybody who has evidence that it is not. Mine was not replaced by them, but was filled with silicone when it was still very new by MR, the harness that is, not the Defender.

Cheers, Mick.

[Col.Coleman]

I don't understand why a mastic gun isn't part of the genuine tool kit.:D:D:D

CC

[tracker]

seeing as how MR are getting a wrap here .talk to them about leaking injector seals.;)

[alien]

the solution on the MR harness is having the head of the injector plug removed, filled with a sealastic and the having the cap put back on forcing the sealastic to extrude along the wires sealing the plug.

so far I havent had first hand experience of one of these harnesses not doing its thing.


Yes MR fill the plug with a silicone substance of some sort so the oil doesn't make its way down the wires. They certainly seem to think it is a permanent fix, I have not heard of anybody who has evidence that it is not. Mine was not replaced by them, but was filled with silicone when it was still very new by MR, the harness that is, not the Defender.

Cheers, Mick.
This tip was passed on to me by a Guru down my way.
He's been doing it for a while with no "come backs" so time will tell.

[tracker]

Driving along at cruising speed my Td5 defender has an intermitant problem where it starts to misfire and lose power, when I pull over the engine stalls. If I go through the fuel priming sequence the engine starts again (after a lot of cranking) and runs fine after that, sometimes for only a kilometre or so, other times it will keep going. When the engine starts it sometimes (around 50% of the time) blows out plumes of blue to white smoke which has a heavy smell of unburnt diesel. I have had this problem very sparodically since owning the vehicle last April, but yesterday it had the problem almost non stop from Narrabri to Ipswich. I had filled it with fuel at Coonabarabran, (about 100kms before Narrabri) and stopped overnight at Narrabri. Can anyone enlighten me on what the problem may be?

Thanks in advance, Mick.
again injector seals may be leaking.

[Hendrik]

Unfortunately swapping the Injector harness isn't a permenant fix CC. It will need doing again at some point.

Mick I can bring my Nanocom to the pub meet on thursday if you want to try and read any codes again?

Have to agree with Pete here, mine still runs like crap (when it runs :mad:) coz there is so much oil in the main loom. I have to give it a clean every week, with some contact cleaner.

[Killer]

seeing as how MR are getting a wrap here .talk to them about leaking injector seals.;)

MR looked at it a year ago when I first had the problem, they couldn't track it down at the time (it didn't play up for them), I am not sure if they checked out the injector seals or not, I will look into it.

Cheers, Mick.

[Killer]

Have to agree with Pete here, mine still runs like crap (when it runs :mad:) coz there is so much oil in the main loom. I have to give it a clean every week, with some contact cleaner.

No sign of oil coming through the loom.:)

Cheers, Mick.

[Scallops]

Welcome home, anyway big fella - meeting Thursday night? :angel:

[Killer]

Welcome home, anyway big fella - meeting Thursday night? :angel:

My turn to drive I think Dan, my place about 5:00pm?

Cheers, Mick.

[Blknight.aus]

dont forget to keep an eye on the oil both its condition and level...

the blotting paper test will help resolve if you have diesel in the oil its not perfect but it might just give you enough warning.

[robbotd5]

dont forget to keep an eye on the oil both its condition and level...

the blotting paper test will help resolve if you have diesel in the oil its not perfect but it might just give you enough warning.
Blknight, can you describe the blotting paper test for me?
Regards
Robbo.

[Blknight.aus]

easy...

take a length of plywood staple a piece of white blotting card to it or a piece of matt finish photocopy paper

stand the board up at about an 80 degree angle then drip a drop of oil onto the paper.

as it runs down the paper it will seperate out

as a comparison on the same piece of paper drop a drop of your original engine oil from the bottle and a drop of diesel from whats in your tank.

compare the spread across the page that occurs from capillary action the diesel should spread the most and the oil the least.

as a bonus as the oil runs down the page the suspended particles will sperate out of the oil and adhere to the page as the drop of oil gets smaller. Lighter particles will come out nearer the top and the heavier ones at the bottom, inspect the oil trail with a good magnifying glass or jewelers loupe under strong natural or white lights

[Killer]

An update to this problem; it seems Trackers advice was spot on, although I got distracted with other things and didn't look at the injector seals until after a phone conversation with Justin Cooper. Number 3 injector seal was leaking. Sorry for not taking yor advice earlier Tracker.

Cheers, Mick.

[wowscounty]

more than likely the fuel pump in tank fails around 120ths ks