hall sender unit....

[cupra_bish]

...in a K reg vw polo

does anybody know what this part does? what are the symptoms when its broken?
i think its part of the distributor, something to do with the ignition timing?

thanks for your help.

[Steve_D]

Hall effect sensors are used for a number of things but I suspect you mean for ignition timing.
Don't know where it is on your engine but could be in the dizzy, against the front pulley or even reading off the flywheel.
If it's not working then the engine won't run.
Quite rare for them to fail but can sometimes come loose and move which again could stop the engine or produce odd intermittent running.

Steve

[stevieturbo]

Such sensors measure rotational speeds.....so could be situated close to anything that rotates.

[cupra_bish]

thanks for your reply, its not my car, a friends. it broke down, the aa/rac man said thats what the problem was. so he removed and cleaned it and got it working again by the side of the road. He wants me to replace it for him, but i've not come accross it before. its in the dizzy, under the rotor arm i think.

something like this?

Edited by cupra_bish on Sunday 2nd November 17:57

[Steve_D]

If AA man cleaned it and it's now working then all should be well.
I doubt cleaning it was actually the fix as being dirty is unlikely to stop it working. More likely the AA re-gapped it or fixed a dodgy connection.

Did the AA say replace it?

Steve