How do you know when you Hall Sensor is going bad?

[snipes]

???

[Crazyswede]

Your car will either not run, or if it does run it could have an erratic misfire or mysterious stalling condition. They don't go bad all that often.

[The Red Baron]

If it does go bad, you can easily diagnose it by noting that the tach will not move when you crank the engine (no tach signal).

[DeLorean]

Your car will either not run, or if it does run it could have an erratic misfire or mysterious stalling condition. They don't go bad all that often.

well, they don't go bad too often, but the plug on the dizzy pretty commonly snaps off and breaks the hall sensor wires...

but yeah... the hall sensor is one of those things that either works or it don't. not really a thing that starts to go bad from age.

[matt]

I had one go bad, erratic misfire occasionally but a fairly common stalling problem. Turned out to be a bad ground that eventually caused the hall effect to fail.

[Geoff]

I had an issue with one on an '85 SPG where the wiring wasn't well shielded (plus the wires had broken in the distributor and had been soldered together). Lots of erratic running, timing got 'wicked retahded', and the car would sometimes die and refuse to restart. '91 SPG distributor and a full Hall sensor wiring harness plug to plug from a later car fixed the problem in a nice way.

[SaabsBreakDown]

i rewired a hall sensor on the side of a rally access road once with wire i cut out of the car



some Subaru mechanics were impressed