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Gehard Z



Member Since: 15 Dec 2018
Location: Tokyo
Posts: 29

Japan 2014 Defender 110 Puma 2.2 CSW Tamar Blue
about the engine performance on the mountain
Hello
I am a defender owner from Japan (Though I m not Japanese Razz)
Yesterday I went to Yatsugatake mountain with my defender (2014 County, 22,000 miles) and when I tried to start my car by using anti stall system (no touch on the throttle, just clutch and brake) as usual on a long slope (around 30% I guess) the engine sounded kind of weak and it stopped after several seconds.
There was no strange noise from engine or transfer box but the engine sounded like not as strong as usual.
The altitude was about 5500~6500 feet, temperature was around 86F and it was raining at that time.
I always use anti stall to start on slopes and never failed so I don't think I did anything wrong this time.
May I have any advice about that?
Will the change of altitude make effects on the performance of engine?
Post #783707 29th Jul 2019 2:04am
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wyvern



Member Since: 13 Dec 2009
Location: Cornwall
Posts: 2066

United Kingdom 2012 Defender 110 Puma 2.2 XS CSW Firenze Red
Hi Gehard,

welcome to the Forum !

I have just come back from 3 weeks of mountain passes in Europe at 2500 meters and 30’c with a fully loaded 110 2.2 camper and had no real issues.
It may be that there was a small stone or indentation were you had parked that provided a bit of a ramp for the wheel to climb, (plus the angle of the hill,) ??

If the engine and gearbox was working well before and after it may not be anything mechanical ... however its a defender so any kind of scenario may come into play.
There may be more people come back with some technical ideas but if its a one off and has worked ok since then just observe and note any changes.

You could try plugging in a fault reader to see what the ECU says about the event.... Poppy - TDCI (Puma) 110XS 2.2 - Camper conversion - see the build here - https://www.defender2.net/forum/topic56530.html
Elgar -TDCI(Puma) 110XS Dormobile - now sold
Devon & Cornwall 4x4 Response - DC126
Post #783725 29th Jul 2019 7:03am
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Grenadier



Member Since: 23 Jul 2014
Location: The foot of Mont Blanc...
Posts: 5765

France 2011 Defender 110 Puma 2.4 DCPU Corris Grey
Re: about the engine performance on the mountain
Gehard Z wrote:
Hello
...when I tried to start my car by using anti stall system (no touch on the throttle, just clutch and brake) as usual on a long slope (around 30% I guess) the engine sounded kind of weak and it stopped after several seconds....


When you refer to 'as usual' were the other slopes you have used the anti-stall technique on, as steep as this slope on Yatsugatake? You say 30%? That's pretty steep for any hill. And if it is that steep, were you in low range?

Lastly, even if the air-temp was warm, was the Engine warm or was it from a cold start, even if you'd let the engine run a bit first?

Just wondering.... Monsieur Le Grenadier

I've not been everywhere, but it's on my list.....

2011 Puma 110DC - Corris Grey
Post #783745 29th Jul 2019 9:29am
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Gehard Z



Member Since: 15 Dec 2018
Location: Tokyo
Posts: 29

Japan 2014 Defender 110 Puma 2.2 CSW Tamar Blue
Hi wyvern
Thank you for your kind advice!
it is a paved road I think there was no stone or indentation....
After that everything went well.
It is hard to think performance down happens at such low altitude.
I think I am going to do some test this weekend to see if everything goes well.

Hi Grenadier
Thank you for you advice!
hummm...maybe not so steep. around 15%~20% maybe? (far different from 30%....sorry)
I have tried many slopes which are worse than that one in 1st gear high range and never failed.
I think the engine was warm at that moment.
I had been driving for over 1 hour before that. I did stop my car and turned off the engine for about 5min to have a rest but I don't think the engine can get chilled so soon.
Post #783758 29th Jul 2019 10:26am
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