> John Russ wrote: > > John R. 86 Vanagon > > What is ,and where is and what dose it do ? This so called Hall effect > sender. The Hall sender is part of the distributor. It more or less replaces the old points and condenser. Basicly as the distro spins, this thing generates a sharp electrical peak once a revolution. I'd have to take it apart to tell you just how it does this. Anyway, the hall sender unit consists of a collar on the distro shaft and a plate in the distro with some electronics and then three wires connect it to the outside system. A positive 10 or 12 volt wire, a ground, and a signal wire. These three wires come out of the distro thru a plastic elbow near where cylinder 4 will be sparked. This elbow is a connector socket as well and so there are three spade connector type things in the elbow. It just so happens that these spade connectors attach to the wires of the hall sender plate over the metal bodyof the distro. Thus, when the elbow ages and cracks with use, the three uninsulated spade connectors are free to contact the distro body which grounds out at least the signal wire. Without this signal, the ECU and tach do not get a timing/rpm signal and thus think that the engine is not turning and never getting to a point where a spark should be delivered. Thus, you get no spark and no fuel delivery... dave |
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