D697 Tyres, Vic High Country and Sudden Engine Cutout

**go-disco4** · 16th June 2013, 12:28 PM

HI All,

1. Purchased set of Bridgestone D697 and tried it out in Butcher Country in Vic high country over the long weekend. It worked well on the very muddy ruts, bog holes, river crossing and slippery steep descents and ascents, and rocks.

Also very quiet on road.

I did get a tiny puncture high up on the sidewall, but I think this is bad luck rather than the tyre.

2. I have a D4 2.7 TDV6 without rear e-diff. The car handled just about everything without any trouble except for one steep muddy ascent:

I was on rock crawl, but cannot remember whether HDC was on, but DSC was on

The wheels started to slip a bit, and I accelerated a bit to engage the TC.

Then the engine suddenly cut out! What I was not sure was whether the engine cutout while the car was inching forward still or whether I braked as the car lost traction to prevent the car from slipping backwards.

Bit nerve racking to have engine cutout on steep slippery slope. However, it started again, and i managed to get up the slope with a bit more momentum.

Query?

I read a thread here about the D4 TDV6 engine cutting out suddenly but I cannot find the thread. I wonder if the same thing happened to me?

Does anyone know what may have caused this?

Under what conditions can it happen?

can we predict when it may happen and how to avoid it?

Is there a fix for it?

many thanks

GD-4

**Canaussie** · 16th June 2013, 12:33 PM

I've also had this happen to me in sand but I reckon it was user error but don't know why the motor stalls and cuts out??

**101RRS** · 16th June 2013, 01:23 PM

The engine cut back because you had DSC on - detected sideways movement and cut power - all quite normal.

When in fast open offroad and even slower stuff leave DSC as it does provide some protection if control is lost but where you are doing slow technical stuff you need to have DSC off to get full capability.

Garry

**go-disco4** · 16th June 2013, 01:33 PM

Thanks Garry

It actually cut out altogether and stalled not just lost power.

tould lost of power result in engine stalling altogether?

I went to one of the GOE seminar and the notes say to leave the DSC on for steep inclines. Apparenlty the TR responds quicker with DSC on

GD-4

**DiscoWeb** · 18th June 2013, 09:17 AM

GD-4,

I second garrycol, everything I have ever been told suggest DSC off when in the technical stuff, particularly mud and sand as the TC detects wheel spin and retards power etc to stop slipping at the exact time when you want to have all wheels seeking traction and spinning a bit, not digging holes.

Happy to be corrected but this has worked for me in the past.

With regard to the stalling, I have had it occur once or twice when climbing steep technical stuff, I am sure you were shown or told about a stall recovery at your GOE seminar.

Whilst unnerving it is not a big deal, apply foot brake and hand brake, put into park and restart.

This is not an uncommon occurrence so probably not much to worry about, probably as much about incorrect technique as anything else, I have found it stall when I have over revved on a section with limited traction and as I released the accelerator the vehicle stalled.

More moderate accelerator use and a bit of momentum generally allows TC to kick in and traction to be found with stalling !

But in all those cases DSC has been off !

Regards,

George

**Brad110** · 18th June 2013, 09:27 AM

I wouldn't put it in park on a steep ascent for a restart in case it gets stuck in park due to the park lock (pawl) jamming.

I've seen this in the past and the only option has been to winch or tow forward to take the weight off the pawl.

**DiscoWeb** · 18th June 2013, 11:22 AM

Originally Posted by Brad110

I wouldn't put it in park on a steep ascent for a restart in case it gets stuck in park due to the park lock (pawl) jamming.

I've seen this in the past and the only option has been to winch or tow forward to take the weight off the pawl.

Brad,

I did note to keep your foot on the brake and then apply the hand brake before putting it in park which should limit the possibility of the vehicle rolling back and putting to much weight on the pawl.

Some would also advocate, if it is safe, to get out of the vehicle to let the nerves calm down and checking the right lines etc as well so I think it would be best to have it in park if that was part of the plan.

Regards,

George

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