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The only place for a coil spring is up Zebedee's arse.
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Joined: Jan 15 2016
Posts: 347

Up until yesterday, all was well in Range Rover land. Then the rev counter decided it was hooked up to a screaming multi - cylinder Japanese two stroke.

Not quite, but it overreads by almost 1000rpm. So on tickover it sits at 1750-1800. When driving, it pops up and down with the gearchanges but always +1000.

When I switch off, it drops to 1000, sits twitching for a few minutes, then drops to zero.

Left it overnight to see if it would just disappear, like you do, but no, same this morning.

Before I go wailing into things, any bright ideas, guys?

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Joined: Mar 22 2016
Posts: 968

Isn’t there an instruments section on the nano ?, I haven’t played that far yet, surprisingly, lol

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Joined: Dec 30 2015
Posts: 2879

Unplug the RH multiway connector to the instrument cluster and give it a dose of contact cleaner. It's driven by the engine speed pulse train from the engine ECU so I doubt that is wrong......

Member
Joined: Jan 15 2016
Posts: 347

Thanks, Richard.

I'll be giving that a go in the morning.

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Joined: Jan 15 2016
Posts: 347

So I did. And lo, it remained the same. Interestingly, it was reading 1000 when I came to it this morning. Dropped to zero when unplugged then back to usual when plugged back in.

Tried the BECM end of things, plug 16, if I recall. No change.

Took column shroud off and had a peer at ignition wiring. It all looks remarkably unmolested.

Buttoned it all back up as I had to be rolling by 11, so none the wiser.

The thing is getting a feed from somewhere, even when the key is in my pocket. Mystery.

Two other things came out of today; one, it spelt the final death of the binnacle surround and two, I've lost a really annoying rattle.

You win some, you lose some!

Member
Joined: Jan 15 2016
Posts: 347

Minimum Intervention Cure

Remove battery earth. Leave for a period (two days in this case!).

Replace battery earth.

Problem gone! :-)

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Joined: Dec 30 2015
Posts: 2879

Nice one, it had all the hallmarks of an iffy earth anyway so having a poke around and clean up might be a good idea.