My '91 passat just died at the stop lights yesterday. The engine turns over
>fine but the cylinders are not firing.
>
>My first guess what that the coil or distributor was not working so I
>started there. I took out a plug and tried to see if there was a spark by
>grounding it to the body, but nothing. I measured the input voltage to the
>coil and when the car is turned over I get 12V but nothing out of the coil
>to the distributor.
>
>My guess was the coil had gone sour. Changed the coil; same problem. >
Hall sensor.