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rover

Member Since: 26 May 2012
Location: Yorkshire
Posts: 150

Poor running and temp gauge drop

Hi all,

My defender 2.2 tdci is intermittently running terribly.

Symptoms are, hesitant, surging, rattly noise from engine and a temperature gauge drop from normal to a quarter then back up to normal. The rattle, hesitancy and surging coincides with the temp drop.

I have changes the fuel filter, coolant, heating working fine, water pump seems to be working fine as pressure out of the bleed valve near the heater matrix.

Its getting worse and more often however it occasionally runs fine.

I have checked the error codes using a simple reader and non shown.

Help would be appreciated.

Regards,

Rover

3rd Jan 2025 11:03am

MK

Member Since: 28 Aug 2008
Location: Santiago
Posts: 2445

2007 Defender 110 Puma 2.4 SW Chawton White

Not sure if a dedicated tool will show other TDCs.

Have you checked connection for the coolant sensor?
Any means to look at the EGR operation?
Fuel filter condition
Battery connections
And the rest of the egine sensors. Puma 110" SW

.............................................................
Earth first. Other planets later

3rd Jan 2025 1:49pm

rover

Member Since: 26 May 2012
Location: Yorkshire
Posts: 150

Hi MK,

Thanks for the reply, I have changed the fuel filter, checked battery connections.

I am trying to book it in for a diagnostics technician to look at but the Christmas Holidays have not helped.

I'm hoping its something silly and cheap.

Regards,

Rover

3rd Jan 2025 2:41pm

rover

Member Since: 26 May 2012
Location: Yorkshire
Posts: 150

Hi,

I thought I would post about the solution to the poor running and temperature gauge issue.

I took the car to HRS Diagnostics in Holme on Spalding Moor, Yorkshire. He diagnosed a faulty Temperature sensor and replaced it. Now running well.

I can thoroughly recommend Steve at HRS Diagnostics, he is a Defender owner and Land Rover enthusiast too.

Regards,

Rover

14th Jan 2025 12:16pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 2100

Good he found the fault, which is the first time I’ve heard of that sensor going faulty.

As a bit of background.

The 2.2 does have a dedicated coolant temp sensor, unlike the 2.4 which uses the measurements from a cylinder head temperature sensor as a proxy for coolant temperature.

The 2.2 does not have a CHT sensor.

Sounds like the coolant temp sensor was faulty. See part 8 for its location.

Click image to enlarge

14th Jan 2025 12:48pm

rover

Member Since: 26 May 2012
Location: Yorkshire
Posts: 150

IanH,

It was indeed the coolant temperature sensor, part 8 on the illustration.

Regards,

Rover

17th Jan 2025 11:38am

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