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BruceT



Member Since: 01 Nov 2010
Location: South Africa
Posts: 518
South Africa 
Great thanks Naks. Thumbs Up
Post #138961 13th Apr 2012 10:54am
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The Boy



Member Since: 28 Aug 2008
Location: East Northants
Posts: 1459
United Kingdom 2009 Defender 110 Puma 2.4 XS CSW Rimini Red
I knew about cold air = dense air = more power but I what I did not know is that it reduces engine coolant temperature to a degree that it would make a difference to what we are talking about.


Every time I feel I have spent enough on my Defender something else comes up Rolling Eyes
Post #138962 13th Apr 2012 11:00am
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Regard



Member Since: 08 Dec 2011
Location: RSA
Posts: 251
South Africa 2011 Defender 110 Puma 2.4 X-Tech LE Orkney Grey
Hi Bruce

I have also struggled with a simmilar problem.

I am not sure it is the same symptoms but mine is a perfect running car up to 120km/h and then as soon as it gets a bit warm outside the car struggles to stay at 110km/h. So not a massive powerloss but you can feel there is less power.

I have also struggled with a simmilar problem.
With my Ultra-Gauge I have noticed that as soon as the inlet temp moves above 34degC the ECU cuts back on the Fuel Rail Pressure as well as the boost pressure. Now, in the cooler climate, it doesn't do it at all and my inlet temps almost never goes above 27degC.

So, my waranty runs out in September. Gues what my first up-grade will be........yip, intercooler and silicone hoses.
Post #138963 13th Apr 2012 11:11am
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Regard



Member Since: 08 Dec 2011
Location: RSA
Posts: 251
South Africa 2011 Defender 110 Puma 2.4 X-Tech LE Orkney Grey
The Boy wrote:
I knew about cold air = dense air = more power but I what I did not know is that it reduces engine coolant temperature to a degree that it would make a difference to what we are talking about.


Every time I feel I have spent enough on my Defender something else comes up Rolling Eyes


On the Ultra-Gauge I have noticed that it has nothing to do with coolent temp but only gets influenced by INLET temp. And inlet temp and coolant temp doesn't seem to be correlated.
Post #138966 13th Apr 2012 11:22am
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robharvey



Member Since: 14 Dec 2009
Location: Durban
Posts: 86
South Africa 2009 Defender 110 Puma 2.4 SW Alpine White
I also get this. Spoke to the service manager at LR Vereeniging, Giovanni, who tells me the fix is a larger intercooler which he gets from Elton at Turbochip (or whatever he is called now). Elton quoted me ZAR4.5k ex VAT (I think). Giovanni was at pains to point out that it is not a LRSA approved mod, but definitely solves the problem of the power-down on hot days.

Regarding why it happens to some Pumas and not others I think it has a lot to do with driving style. Mine occurs when it's hot and I'm ascending a hill, but only after I've been gunning it for a long period. If I've been driving sedately it won't do it.
Post #138967 13th Apr 2012 11:40am
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BruceT



Member Since: 01 Nov 2010
Location: South Africa
Posts: 518
South Africa 
Thanks all for the replies. I have sent Winston a mail with the link so hopefully he will see this.
Post #138968 13th Apr 2012 11:52am
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Eduardo



Member Since: 28 Aug 2008
Location: Región Metropolitana
Posts: 2110
Chile 2007 Defender 110 Puma 2.4 SW Stornoway Grey
Similar problem here appears during hot weather after several hours of driving.
Probably a new intercooler will be the solution in the long term. Sad

Cheers Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

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Post #138971 13th Apr 2012 12:05pm
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The Boy



Member Since: 28 Aug 2008
Location: East Northants
Posts: 1459
United Kingdom 2009 Defender 110 Puma 2.4 XS CSW Rimini Red
OK, right so what we think is that it is the inlet temp that is causing the shutdown rather than the coolant temp, right? That makes sense but when mine did it was because the coolant got too hot (plastic bag over the grill) so maybe it does work both ways. Think I may look into this more when I get a few spare hours and try to reproduce the conditions that mine overheated.

Very interesting thread Thumbs Up
Post #138976 13th Apr 2012 1:01pm
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Regard



Member Since: 08 Dec 2011
Location: RSA
Posts: 251
South Africa 2011 Defender 110 Puma 2.4 X-Tech LE Orkney Grey
The Boy wrote:
OK, right so what we think is that it is the inlet temp that is causing the shutdown rather than the coolant temp, right? That makes sense but when mine did it was because the coolant got too hot (plastic bag over the grill) so maybe it does work both ways. Think I may look into this more when I get a few spare hours and try to reproduce the conditions that mine overheated.

Very interesting thread Thumbs Up


Keep us in the loop! Thumbs Up
Post #138985 13th Apr 2012 1:42pm
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