Question for the Td5 Gurus.

**Killer** · 2nd August 2010, 12:24 PM

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** · 2nd August 2010, 01:07 PM

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** · 2nd August 2010, 01:17 PM

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** · 2nd August 2010, 01:22 PM

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** · 2nd August 2010, 01:31 PM

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** · 2nd August 2010, 02:44 PM

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** · 2nd August 2010, 02:48 PM

Originally Posted by Col.Coleman

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** · 2nd August 2010, 02:54 PM

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** · 2nd August 2010, 03:00 PM

Hi Mick,

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

frustrating...!

Rgds
Pete

**Blknight.aus** · 2nd August 2010, 04:48 PM

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

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