PWR / ECO Mode

[gjn]

Anyone out there have a technical explanation of the difference between ECO, Normal and PWR mode in the 28. D4D engine?

[Drysie26]

Was just about to put up same question!

Went for first long drive in my 2016 sr5 auto on weekend. Used the power button whilst overtaking a few times. Liked the feel of it so left it on for last few hours of drive.
Questions are:

What does it actually do?
Do some people here leave on power all the time?
Does it effect economy much?

Cheers.

[creaky]

I find the pwr mode nicer for driving around in stop start traffic. I drive like a grandma generally so prefer the twiddle the toe throttle response to the plant it method in normal /Eco around town.

I am not sure if the pwr mode just changes the throttle response and auto shift mapping, or also changes fuel mapping etc ?

[nickoslux]

It doesnt seem to give any more power just throttle response is better, similar to a sprint booster. Have tried dufferent settings towing and the power mode just seems to rev its nuts off with the auto, i prefer to tow in ecomode to keep the revs down so it uses the torque better

[heavymental]

I've only used PWR whilst offroad and there's a significant difference between normal and pwr when gunning it up the sand dunes.

[Stunner]

I generally use Normal for Normal driving.. lol.

I use ECO with cruise control on the HWY 110km/h+

I use PWR when in a lower gear 2nd or 3rd approaching a hill or when I need a little extra oomph for an overtake on the highway.

I'm 5000kms on my lux and haven't had it off road yet to try.

[adamkberger]

Eco mode also reduces air con output to increase fuel economy.

[andyhoughton]

Also keen to know the technical difference

[darren278]

I don't like the power mode. Just seems to make the throttle too responsive which means I constantly ride the clutch when pulling away. It's ok in the hills once in the move I suppose.

[Rickoo5]

I have a manual and prefer the normal mode. If you need more power just push the peddle a bit more.


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[Moose_]

i think the most noticeable difference is the throttle response. similar to what those idrive controllers do.

if you hold your foot on the throttle in the same position and change from eco to normal and then normal to power, it accelerates without moving your foot. Basically instead of 100% throttle being at 100% pedal travel, i would imagine that power mode is more like 100% throttle at 60 or 70% pedal travel.
Eco mode probably still delivers 100% throttle, however the response is reduced (i find this handy on low speed rocky tracks to stop accidentally accelerating too much when you go over bumps/rocks).

[dandin]

Increases in boost can also been seen when moving from Eco->Normal->Power. I'm not sure if this is a result of throttle (really we're talking fuel, because it's a diesel) being virtually increased or changes in mapping between modes. I'm just sharing what I've experience with my own car using data logging.

[Gipsy]

My guess is mapping.

[gjn]

My guess is mapping.

I figured it would be something like that, I'll play around more with it once mine is run in.

The other thing I've noticed different between the diesel and my previous V6 is how fast it goes in reverse! Backing a trailer in the V6 was a doddle as it idled quite low, the diesel on the other hand seems to want to gallop away in reverse so I end up dipping the clutch all the time - annoying but I suppose I'll get used to it in time. The reverse gear ratio is higher than 1st - that's the first time I've seen that in almost 50 years of driving.

[Gipsy]

Don't slip the clutch just let the diesel do the work, hard to stall it and the torque will do the work.

[gjn]

Don't slip the clutch just let the diesel do the work, hard to stall it and the torque will do the work.

The problem is that at idle with the clutch out it is too fast when trying to manoeuvre the trailer around corners, the only way to slow down is to dip the clutch in periodically and let the rig coast (not slipping the clutch - more like in then out repeated).

[Gipsy]

OK just getting used to it, that's why I have an auto

[gjn]

Yup. I did briefly think about an auto but after just under 50 years of driving manuals it's hard to break the habit. Maybe in another 10-15 years when I replace this one I might try a two-pedal for a change.

[Gipsy]

Well 50 years did it for me

[Gipsy]

By the way, there is a thread on here about a switching method to disconnect the front diff in low 4x4 which may be your saviour