TD5 tuning?

On or around Sun, 12 Nov 2006 09:08:56 +0000, Derry enlightened us thusly:

that was a known trait on earlier TD5s especially.

In general, the engine needs more revs than a TDi. It also "sounds" faster so that the same engine note represents 20% fewer revs, which compounds the problem - keep an eye to the rev counter if you have one. If not, one can be fitted.

I've got a 2003MY D90 and it starts perfectly, even when it's been standing for a week or two (but so did my old 300tdi).

I think they changed the Engine Management somewhere around 2002 / 2003. If you let the "computer" sort it out and don't touch the throttle, mine will pull away uphill with 1000 litres of water and some logs in the trailer (about 1.5 tons + the trailer). I had heard about your problem and wasn't looking forward to it, but it hasn't happened so I assume that I've got the later Engine Management. Perhaps you can get the early ones reprogrammed ??

Joskin

From stone cold? How long do you hold the first turn? Do you wait for the glow plug light to go out? My DII TD5 starts very well, though from cold I wait for the glow plug.

I can feel the turbo on mine kicking in, really start to feel it at just over 1900rpm. Until the turbo comes in preformance can be quite sluggish, particulary if you are in too high a gear.

This might be the slight delay between pressing the go pedal and the engine actually responding. This delay is down to the "fly by wire" nature of the TD5, one has to remember to wake the engine up from idle if you need lots of power/torque when you let the clutch up. So pulling into a small gap in fast traffic or a standing start with a heavy load can be exciting (or not!).

How does that work then ?

Steve

5 cylinders, so for every rotation of the crank, you get more "bangs" from cylinders firing as you've got an extra one.

takes all sorts I know, but that seems an odd way to make paper :)

That wasn't quite the idea :-) I was hauling water because our well had run dry in the summer, and it seemed a waste not to collect some logs for winter while the tank was filling. Trailer seem to go better when they're over loaded, anyway :-)

Joskin

Ah, that's the other difference I noted. If it was the 300Tdi, I'd be poking around under the bonnet trying to adjust the tick over to a bit slower. But I suppose it is normal.

As for starting, the 300 starts first turn without any waiting, summer or winter. I'd expected that from the TD5 and, out of habit, haven't been waiting for any lights to go out.

I've read about swapping chips. Is it something to consider? This is a

52 model.

Derry

I

The TD5 has a very effective anti stall facility. But you override this when you touch the throttle pedal.

Try pulling away just by releasing the clutch and the then applying throttle once you are moving. It is quite hard to get used to not touching the throttle.

It does have it's limitations When my trailer is fully loaded (3.5 t) I use low ratio to pull away on a hill as I refuse to slip the clutch.

The anti stall software really comes into its own offroad I have recently completed a Landrover driver training day and techniques demonstrated take advantage of this to give much more of an advantage over Tdi engined vehicles .

On or around Sun, 12 Nov 2006 11:58:46 +0000, Ian Rawlings enlightened us thusly:

prezackly. most obvious with a V8, compared with a 4 cylinder - if you've only ever had 4-cylinder ones, then the V8 intially sounds like it's revving its nuts off at about 200 rpm.

On or around Sun, 12 Nov 2006 11:20:49 +0000 (GMT), "Dave Liquorice" enlightened us thusly:

fly-by-wire tranny does that too. The delay is very slight, probably about half a second, but it can catch you out.

You can also do what someone else said, leave your boot steady and let the engine management sort it out - slow on the clutch to give it time to react.