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Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

2011 Defender 110 Puma 2.4 HT Corris Grey

one thing I hadn't realised until recently about the idle jack (which is the feature you're talking about) is that it doesn't have a switch telling the ECU you're in 1st or reverse. It just guesses you are based on the engine revs and forward speed.

11th Jun 2015 11:29am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17526

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

^^^ Which is something discussed at some length several months ago!

It uses the range detection switch and speed transponders to determine the gear. Clever stuff.

11th Jun 2015 9:31pm

Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

Exactly, which is the recently I was referring to

Just thought I'd pass that on

12th Jun 2015 1:18pm

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6312

2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey

tightened the earth on the battery the other day and all seemed good but now

rev counter is waving up /down. not a lot but clearly it's not right. also getting the clatter sound which I'm assuming is the result of a poor electrical signal but why o why o why ?

17th Jun 2015 9:59am

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6312

Just tried the hi/lo again after removing the plug on the side of the transfer box (not sure if it was hi/lo or diff lock).... Anyhow tried the hi/lo and in low in 1st no increase in revs while clutch depressed.......and slowly released....and then increased for a bit fluttered about and then went again and can't get them to increase again eight in first or reverse?

Any ideas?

19th Jun 2015 9:08pm

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6312

I think what I unplugged because was the speed sender - but not sure?

Is the hi/lo switch accessed from above ie cubby box out?

20th Jun 2015 6:04pm

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

The speed sender is behind handbrake drum down the bottom

20th Jun 2015 6:07pm

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6312

Thanks Munch90 - so it was the speedo.

Need to get to the top I presume for the hi/lo?

Cheers mate.

20th Jun 2015 7:10pm

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

Might be worth checking one of your posts , check your rods or something , think it may be the one in your own pic

sorry dont know 100% , as never played with switch

20th Jun 2015 7:27pm

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6312

Hmm good thinking...

I think the link rod changes position of get lever and doesn't impact on the switch ( but not sure)

20th Jun 2015 7:39pm

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

Yes , but in the pic , you can see a switch

20th Jun 2015 7:42pm

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

eBay Item No. 111646389017

Hi lo switch

20th Jun 2015 7:45pm

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6312

Thanks Munch90. Will go have a look shortly.

20th Jun 2015 7:55pm

pumaxs

Member Since: 18 Jul 2012
Location: Bath
Posts: 180

2007 Defender 110 Puma 2.4 XS CSW Zambezi Silver

ericvv wrote:
Seriously now, the few times per year that I put my Puma 2.4 into low box (just to keep the mechanism working), the rpm at idle remains at 800, but as soon as I move the gearstick to 1st, the idle revs will immediately increase to 1000, maybe even slightly more and not fall back to 800 again until I put the gearstick back into neutral.
Eric

That's interesting.
I drive the 'Spaniel Taxi' in low range on a daily basis.
On mine, the revs do not pick up as soon as either low 1st or reverse is selected.
Having released the clutch, with no throttle input, revs have picked up to just over 1k rpm after travelling approximately 5 or 6 feet.
Not an exact measurement - I just lined the front mud flap up with a dandelion

Am I normal?

'57 Defender 110 XS Station Wagon 2.4tdci

20th Jun 2015 11:15pm

Caterham

Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6312

hi/lo switch now disconnected, so will see how it goes later?

21st Jun 2015 9:58am

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