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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1674
Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
I’ve seen on the Puma before people doing and changing all sorts of cooling system parts only to find the fault is CHT sensor they just must assume it’s a coolant temperature sensor and not even look at terminology or theory of operation. Penny smart - pound stupid Neutral
Post #710330 1st Jun 2018 7:09pm
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zsd-puma



Member Since: 09 Aug 2016
Location: Kent
Posts: 2720
United Kingdom 2010 Defender 110 Puma 2.4 USW Santorini Black
Quote:
I’ve seen on the Puma before people doing and changing all sorts of cooling system parts only to find the fault is CHT sensor they just must assume it’s a coolant temperature sensor and not even look at terminology or theory of operation.


That's probably true, someone used to old carburettered petrol engines would probably just assume it only operates the dash temperature gauge. To test those it was just a case of shorting the wire to ground and seeing if the gauge when to hot, if it did you needed a new sensor. Not quite that easy anymore! Laughing
Post #710360 1st Jun 2018 8:37pm
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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1674
Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
Glow plug and smokey start like yours, they’d thrown all sorts of sensors, relays and parts at it, visual inspection and a wiring diagram would have been a decent idea in my eyes Whistle



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Post #710363 1st Jun 2018 8:50pm
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zsd-puma



Member Since: 09 Aug 2016
Location: Kent
Posts: 2720
United Kingdom 2010 Defender 110 Puma 2.4 USW Santorini Black
That wasn't supposed to look like that then? Laughing

Tired or depleted batteries are a good one too. The computer/computers get starved of power when you crank it so all sorts of random codes get stored in the fault memory. So people start changing all sorts, because the ECU says so. It's good to start with the basics.
Post #710366 1st Jun 2018 9:08pm
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