Erratic Speedometer?

[Celeste16V]

The speedometer on my Clio 1.6 16V moves smoothly up to say 120km/h, then starts jumping wildly. I am told this is due to a small gear or something that is worn and which is situated on the gearbox? Where should I look?

 

[RichMcc]

http://www.cliosport.net/forum/showthread.php?t=247739

 

[ben_p]

speedo sensor, its like a black pencil, at the back of the gearbox, (next to the dogbone mount.

unclip the connection and then just pull the sensor out and replace with a new one , re connect.... job done

 

[Scutch]

When I had my first Williams, my speedometer needle would jump all over the place. Turned out is was just the cable had come loose.

Another time it did it and was erratic, then stuck at 40mph even though I was doing more/less than that speed. Amazingly, all I did was top up the water in the engine and it cured it (was completely out of water).

Your sounds like the speedo sensor though.

 

[ben_p]

When I had my first Williams, my speedometer needle would jump all over the place. Turned out is was just the cable had come loose.

Another time it did it and was erratic, then stuck at 40mph even though I was doing more/less than that speed. Amazingly, all I did was top up the water in the engine and it cured it (was completely out of water).

Your sounds like the speedo sensor though.

LOL!

 

[Celeste16V]

Thanks everyone, I'll take a look at the sensor and the earth. The exhaust manifold was replaced recently, after it cracked right through, as the engine mounting broke when I swerved around a donkey and a pothole in the road

They might have knocked the sensor while working on the manifold?

 

[edde]

Thanks everyone, I'll take a look at the sensor and the earth. The exhaust manifold was replaced recently, after it cracked right through, as the engine mounting broke when I swerved around a donkey and a pothole in the road

They might have knocked the sensor while working on the manifold?

Yep hightly likly.