Tacho?

[Waynester]

My tacho rises to 1000/1500rpm, when the engine is switched off!
as soon as i turn on the ignition it resets back to zero.

What's causing this?

[rev-erend]

Weird !

Has it always done this since you bought the car..

Sounds like a wiring fault.

From memory - the tacho is a simple beastie..

It just takes the 'source' from the low tension side of the coil - my guess is around the ignition barrel area - and then will also have a negative to earth.. it just counts the on / off's of the coil to measure rpm.

One of the wires must be loose..

Have a check in the wedge bible for the wire colour - should help to identify it.

[Waynester]

The previous owner stated it has always done it.

Thanks, i'll investigate with the trusty bible.

[Stever]

Wayne mine does the same - perhaps it only happens on green ones

[adam quantrill]

I have a green one and it's OK. However the wife's jeep (also green) has a similar feature with the petrol gauge...

[Waynester]

Stever said:

Wayne mine does the same - perhaps it only happens on green ones

Hi Steve - That is wierd! Not stressing about it, doesn't cause any other issues as far as i can see.

Green Wedges rule!

[mightymouse]

Stever said:

Wayne mine does the same - perhaps it only happens on green ones

"Characteristic of the car Sir" :heehee: :heehee: :heehee:

[blaineuk]

all 400's do it, due to the dial being upside down, it because the needle has no feed to it with ignition off.

[Waynester]

blaineuk said:

all 400's do it, due to the dial being upside down, it because the needle has no feed to it with ignition off.

Doh! Of course.

Thanks Blaine.