 | Home > Puma (Tdci) > Temporary power loss going full power up incline |
 
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| Swollock Member Since: 16 Mar 2013 Location: Wellingborough Northants Posts: 259   
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I had an almost identical situation when towing my caravan up an incline, mine was a cheap fuel filter that I had fitted restricting the fuel flow. Fitted genuine or at least quality ones since then and not had the problem again. 2008 Defender 110 XS CSW
Volvo S60 T8 Triumph 1200 Rally Explorer G0UBX |
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20th Jul 2023 6:34am |
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| Polarismd Member Since: 13 Feb 2022 Location: Leicestershire Posts: 60
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Hi,
Has your Puma had an engine remap? If so, you should change the thermostat. There are two options, one for UK normal temps and one for hotter climates (I am away at the moment and forget the opening temps). I had the same issue last year. On here somewhere is a description of the problem from someone in Europe. They went through lots of solutions and finally found this one. The explanation is that the remap causes the engine to run hotter than normal, causing the ECU to briefly put the Air Conditioning fan on. This brings the temp down quite quickly. Since installing the new thermostat I no longer have the problem when towing my caravan, yet last year on motorway grinds and up some of the hills in the peak district, I had the same issue. I am not sure why the earlier opening thermostat makes this difference as you would expect it to be fully open already - or it could just be that the older thermostat wasn't opening properly (I did test mine, and it did appear to open fully at the right temp, albeit suddenly, when I expected it to be a gradual open). Chris PS - I had no idea my Landy was remapped until I took it to a diagnostic centre. So that's another issue to look out for if yours is a recent purchase as it affects insurance. |
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20th Jul 2023 9:25am |
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| shropshiredefender Member Since: 05 Jun 2017 Location: Shropshire Posts: 832  
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The Cylinder Head Temperature Sensor will kick in and drasticly reduce power if it senses overheating. Annoyingly it has no relationship to the Temp. Gauge and does not throw a fault code. It causes the engine to behave exactly as you describe. When I had this problem 200 fast motorway miles were covered with no problem. Turning off the motorway into traffic caused sudden power loss recovering shortly after. My problem was a pin hole leak in the radiator, under load the water level was just low enough for the CHT sensor to activate, at a steady speed the airflow kept the engine cool. If this is the problem simply topping up the coolant will solve it. If it does a thorough check/overhaul of the cooling system would be a good idea. Good luck  Just because you're offended doesn't mean you're right. |
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20th Jul 2023 7:30pm |
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| 110nut Member Since: 14 May 2023 Location: Essex Posts: 35 
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The first thing I would check is a split intercooler
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25th Jul 2023 8:01pm |
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