 | Home > Puma (Tdci) > Altitude Sickness? |
 
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| Cheshire110 Member Since: 26 Jul 2013 Location: Cheshire/London Posts: 2751  
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I'm away with uni (geology) mapping some of the Alps for a month or so at the moment, hence not been on here much recently....
Anyway we're at between 2000 and 2500m here, (and hence air pressure down to 0.75 of sea level, or so.) it's also pretty cold over night. Anyway when first starting in the morning or returning to the car at the end of the day, it's very white smokey on cold startup and until warm. Particularly in low gears on anti-stall and when in low range (lots of slow bumpy steep tracks here). Also sounds pretty 'pinky' / 'diesel-knocky' when first moving away. Runs pretty well when up to temp, other than being a little down on power due to lower O2 pressure. And also starts fine when warm. A little white smoke when climbing slow hills (ie <5mph, low range) I know white smoke is usually unburnt fuel, and you can smell it a little inside the car too. Is this just typical for such high altitude? 2.4, EGR blanked and Alive remap with EGR disabled. Otherwise runs very sweetly when last in the UK, and over the journey here. Cheers, David Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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16th Jun 2015 2:10pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6604 
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Not a criticism of the remap, but perhaps related to it?
 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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16th Jun 2015 5:33pm |
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| Eduardo Member Since: 28 Aug 2008 Location: Región Metropolitana Posts: 2109  
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David,
I was up to 4,300 mt. and no major problems with smoke despite the slopes or temperature. Only a normal lost of power due the altitude. I have a BAS remap with EGR dissable. Temperatures between -10 to 20°C 2,000 - 2,500 should not be a big deal for the Defender Cheers Eduardo MY 2007 110 SW PUMA 2.4: Big Fog of 64' MY 1994 Jayco 1207 Folding camper: "El Tremendo" Click image to enlarge |
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16th Jun 2015 5:57pm |
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| Cheshire110 Member Since: 26 Jul 2013 Location: Cheshire/London Posts: 2751
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Cheers for the advice guys,
I dropped Gary a PM to see if he had any ideas, as he definitely knows his stuff! Sounds like an underlying problem to me, maybe shown up by the conditions?  Cheers, David
Land Rovers of all shapes S3 onwards… Daily is a 110 V8. |
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16th Jun 2015 8:23pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20299
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Are you using foreign fuel?
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16th Jun 2015 9:49pm |
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| Lorryman100 Member Since: 01 Oct 2010 Location: Here Posts: 2686 |
Symptoms you describe would lead me to check the MAF and air filter though I get the same smoking up here in the winter time when it is cold. The tuners tweak the OEM fuel file including the fuelling curves to take account of the altitudes as they are sold world wide. If you have a scan tool or an ultragauge check the flow from the MAF sensor and post up the reading at tick over and at 2000 rpm. Also check the air filter is not blocked. If the MAF fails then the EMS uses stored values at a given RPM / Load range which does not take into account barometric pressure and would lead to over fuelling giving the symptoms you describe. JMTW
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16th Jun 2015 10:11pm |
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