300tdi versus td5 in torque at idle speed?

**Pedro_The_Swift** · 4th February 2007, 08:35 AM

if you are moving stuff on dead idle,,
maybe you should think about an auto--

**Blknight.aus** · 4th February 2007, 12:21 PM

Originally Posted by sumo

But thats all down hill going that way!!

Seriously on dead idle will they push & pull weight?

Cheers.

yep, on the flat i can move of 2 tons of dirt in the big green trailer at idle, need a bit more for hill starts...

I dont like reversing in high range for 1 reason its too fast and once the traieler goes too far out the QE2 turning circle wont let me catch the trailer.

1.5 tons on the back can be idled up my drive way but I dont think theres much left in it while I am.

tombraider · 4th February 2007, 08:45 PM

Originally Posted by Scouse

IMO, the Td5 is a lot easier to stall than the 300Tdi.
I only really drive brand newies so maybe they get better with age.

That would be due to the transitioning of the ECU from idle control to TPS control.

The engine idle mapping is very good, allowing the vehicle to crawl along. Throw your foot on the TPS and the engine changes to active mapping.

Its this transition which allows the vehicle to stall...

Try driving only on idle and the thing will pull itself along maintaining idle RPM very well (fuels up as necessary). Tap the throttle and one can stall as it changes to base1 map.

**Graeme** · 4th February 2007, 09:51 PM

That's where mine idles smoothly at about 750rpm, but bring the revs up to about 900 and its as rough as guts and acts as though its running on 3 cylinders. But maybe mine's not normal...

**Blknight.aus** · 4th February 2007, 10:23 PM

that, to me sounds like the start of the dreaded tps failure...

tombraider · 4th February 2007, 10:35 PM

Yes, Graemes ECU showed Driver Demand issues and this was mentioned to him.

Graeme, hows it going otherwise? I believe we managed to tune out the other issues you were having.

**Graeme** · 5th February 2007, 06:00 AM

Originally Posted by tombraider

Yes, Graemes ECU showed Driver Demand issues and this was mentioned to him.

Graeme, hows it going otherwise? I believe we managed to tune out the other issues you were having.

Hi Tombraider,
The roughness just above idle occurs in both high and low range, but its at such light throttle movement that it might still be the problem. However in low range the throttle can be held very steady, so I'd be surprised if its the cause. Its not that there's a dead spot, it just runs terribly rough at those constant revs. One day I might have to get it looked at.

Apart from my occasionally trying to use too much throttle at around 1400rpm going uphill in 4th and causing it to fail to accelerate, it pulls and behaves very well. I wonder how its eventual replacement is going to impress me.

**robert42** · 5th February 2007, 08:16 AM

Hi all interesting ,went through this before we brought the td5 as we already had the 300tdi. and wondered if we were gaining anything..
well we still have both and the 300 is auto. td5 is manual..
with the same van the 300 is better at take off. but not as good on the highway.. the td5 is much better towing @ 100ks on the highway with a smile..
but of road towing same van 1800 kg plus ,20 foot. and in steep country the 300 with dif.lock in on dirt is so much better to drive and has plenty to spare.. td5 dose it but you have to drive it and watch what your at..
hills we went on are at the back of bright vic..
and up big hill past mount beauty plus..
well thats what i found anyhow..love both..
have had land rovers since ser.1

Thread: 300tdi versus td5 in torque at idle speed?

Thread Tools

300tdi versus td5 in torque at idle speed

Bookmarks

Bookmarks

Posting Permissions