Intermittant Td5 problem

[Robocop]

Hi guys

I have only owned my Defender 03 for about a month. It finished its 3 year warranty yesterday and the first problem was today.

I was on the highway travelling about 110kph, it felt like the engine had cut out momentairly only for a split second, enough for me to notice but not the passengers.

I came home and the fuel light was on, I had just travelled 600km. It did it a few more times on the way to the servo, the engine went to idol with no throttle response, I turned off the eng and re started and it was fine again. I thought it may be running out of fuel or there was air in the fuel line.

I had a similar problem with my previous 4xd but it was the crank angle sensor.

After I had refueled it was fine for a short while under normal and hard accelleration then returned. It is very intermittant.

Has anyone had a similar problem that can assist?

Cheers
Rob

[460cixy]

fly by wire is playing up by the sounds of it

[Reddo]

sounds like you've picked up crap from the bottom of the tank and the in-line filter is blocking. Turning off the engine clears it momentarily, and sometime it will go for a while before recurring.

The old Inter tractor at home is exactly the same cause the fuel tank is full of rubbish. Engine goes for a while then slowly dies when the fuel level falls and crap in the bottom of the tank gets picks up as the remaining fuel swills it around.

[Mick G]

Yeah, my first check would be crap in the fuel - is it doing it when accelerating or simply maintaining highway speed? For info I have had some throttle/power probs with my '99 TD5 manual Disco over the last couple of years or since fitting a remapped ECU and have changed throttle sensor, crank angle, MAF sensor, had sticking waste gate to name a few.....seems to have recified itself now so something has worked.

Someone told me to regularly run the tank low so that fuel filter picks up some of the crap in the tank and then change the filter....I do this every now and again, but it's a gamble in case you run out of fuel.

Hope this helps, Mick

[Robocop]

Thanks guys, Its done abuot 6000kms in the last month, I had noticed that there was a lack of power about a week ago but put it down to bad fuel.

When the prob first came under notice I was on the highway climbing a steep hill. I put it in 3rd then planted it, the eng cut for a moment. From then on it did it for the rest of the day up till now.

I put a full tank in and drained the water filter or what ever it is. Rubbish did come out of this outlet.

The problem now arises when I am near to full throtle, but have noticed an overall drop in power in all gears.

I may well replace the filters and see how it goes.

Cheers.

[lilpigzuk]

Has the injector harness/engine loom been looked at?? Cant remember if the problem was sorted by then or not. My 2000 TD5 needed both. O-ring fails at the injector and oil seeps through the injector harness, into engine loom then into ECU. Was a worldwide problem on TD5's

[Mick G]

It may be that you are flogging it and it is going into to limp mode. Not sure exactly how it works but when the engine is working harder than normal it reaches a point where the computer cuts power dramatically and wont bring it back on until such things like temperature have dropped back into a safe operating range etc. Mine has done this a few times when towing up long hills and it is very worrying at first.

The car does come good again once it has been aloud to cool down and rest a bit so to speak.

[Robocop]

I'm not sure that I was driving it to its limits, the pedal is only half way down.

Since my last post I have changed the fuel filter in the hope that I just had a bad batch of fuel or the filter was blocked. It had a small increase in power but the initial problem is still there.

I have driven the car when it has just warmed up and the problem is still there. It wasn't like this before when I got it two weeks ago it was fine.

Rob

[justinC]

Check the wastegate actuator, move it with a pair of multigrips, if you can't, it is siezed and this will cause engine to cut out momentarily as it goes into overboost. The Td5 has this feature to protect it from blowing itself to bits....Also check the codes for driver demand errors, these relate to the throttle pedal potentiometer, and if evident you will need a new one.

JC

[Micka]

I had something similar to this in my defender with the Davis chip.

While towing the buggy and hauling a fark load of gear, the engine cut out momentarily and the temp gauge shot to high, and then back to normal, all in a fraction of a second.

I put it down to some sort of self-protecting device, like a "hey dude you're going to really fark me up if you don't back off a bit!"

It has only done it during heavy laden towing at speeds of 110 and there abouts.

[Team Raider]

I had something similar to this in my defender with the Davis chip.

While towing the buggy and hauling a fark load of gear, the engine cut out momentarily and the temp gauge shot to high, and then back to normal, all in a fraction of a second.

I put it down to some sort of self-protecting device, like a "hey dude you're going to really fark me up if you don't back off a bit!"

It has only done it during heavy laden towing at speeds of 110 and there abouts.

Not surprising, customer of mine checked his EGTs with the BD "mild" tune and was reading over 800 degrees on a mild hill.

Not good....

Some mappings are just not polished enough and place too much stress on the engine.

Good programming doesnt warp manifolds either, another common trait of others programs.

[Mick G]

Not surprising, customer of mine checked his EGTs with the BD "mild" tune and was reading over 800 degrees on a mild hill.

Not good....

Some mappings are just not polished enough and place too much stress on the engine.

Good programming doesnt warp manifolds either, another common trait of others programs.

For this very reason I am about to fit an EGT gauge to my D2 with the BD chip, as I am not convinced that the figures I have been quoted are all that accurate. Also going to fit a boost gauge so I can at least make some of my own observations to determine how my car is or should be running.

Aye, Mick

P.S. would you also go by the name tombraider on AULRO? If so, need to speak to you soon about a few options