VW Golf MK2 GTI 16V Hall Sensor Wire Broken

My VW Golf GTI 16V wouldn't start and had been running roughly for a couple of weeks. No obvious cause was apparent so we checked all the wiring under the bonnet and replaced the distributor cap and rotor arm which made no difference.

When checking the wiring from the distributor we noticed that two of the 3 wires from the Hall sender/Hall sensor were broken and the third wire was almost detached too. On clearing back some insulation and reattaching the wires to the Hall sensor plug the car started immediately and was also running far more smoothly than before. Cold starting tickover at idle was also vastly improved with the previous cutting out no longer occuring.

Hopefully replacing the broken wires on the Hall sensor will have resolved these problems.

Update

Hall sensor wires fixed and problem has now gone away. No more rough running and performance back to normal so no misfiring or juddering under acceleration. New Hall sender plugs are available from VW part numbers here



VW Golf MK2 GTI 16V Hall Sensor Plug Wires Broken