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dommo_b

Member Since: 17 Dec 2021
Location: Morzine
Posts: 2

2007 Defender 110 Puma 2.4 HT Barolo Black

Intermittent loss of power & speedo

Hi all.

My 2007 puma has a strange fault where after driving for half an hour or so with the head lights on, there will be intermittent loss of acceleration and at the same time the Speedo suddenly stops working (all other dials continue to work). Once started the problem keeps coming and going until the engine is stopped and restarted. The problem will also occasionally occur on very hot days when the airconditioning is on, with it going away as soon as the aircon is switched off.

The car has a new battery and a voltmeter installed and all looks fine as when the problems occur.

Any ideas? Thanks!

17th Dec 2021 1:33pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

check earthing start with battery and work your way around

and of cores the ignition switch

Last edited by dorsetsmith on 17th Dec 2021 2:17pm. Edited 2 times in total

17th Dec 2021 1:44pm

Stacey007

Member Since: 25 Sep 2015
Location: Cheshire
Posts: 3749

I had similar but would just cut out, all dials off,

Sometimes it would restart almost straightaway, other times i would need to restart,

It could do it once a week / month or 3 times on one 10 mile journey... hot / cold etc made no difference.

It always restarted, but unnerving as your passing a truck on a motorway..

No codes on my code reader. I change the starter relay (under seat) still did it, then we changed the steering ignition key. All sorted

17th Dec 2021 1:49pm

nosnibod

Member Since: 15 Aug 2007
Location: West Midlands
Posts: 370

1998 Defender 110 300 Tdi SW Bronze Green

Got Ian at IRB to change the ignition key/switch in the week. Weird things were happening which made me doubt my sanity, but finally I had a witness when it failed to start three times in a row. The barrel was very well worn and the switch itself was loose in the housing - it’s held in place with two tiny self-tappers.

Ian always replaced the entire barrel (which needs new barrels in the drivers and rear doors) because it all wears together. The new barrel is much tighter and compared to the old one it’s night and day and I’m sure that the looseness of the lock barrel, with keys swinging around, caused the barrel and switch to wear even more.

All good now. And my sanity is mostly restored. Dave
Green Goddess - 1998 Defender 110 300tdi

17th Dec 2021 3:08pm

dommo_b

Member Since: 17 Dec 2021
Location: Morzine
Posts: 2

So I still have this intermittent problem, having checked as much earthing as possible and disconnected accessories such as a winch.

I noticed references to the previous owner having a gel battery in a dual battery setup. Is it possible the alternator setup was changed for a gel battery and might be causing problems now it has a conventional lead acid battery?

28th Dec 2022 9:56am

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 1997

Removing the alternator is not a big job and you will be able to see the part number label on the side of it to check if it’s a std landrover one.
However I expect it’s a standard one and as per above posts I would check out your ignition switch as the culprit.
Lots of posts on here re the ignition switch, just do a search.

28th Dec 2022 12:25pm

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