Tachometer doesn't work! :-(

[Orin Eman]

>
> > Bad things are going to happen if you unplug the timing sensor if the
> > RPM sensor should miss some teeth.  I wouldn't do that.
> > The timing sensor is actually 62 degrees before TDC on Cyl 1.
> > If the car starts, the hall sensor is working.  On later cars,
> > I don't think anything bad will happen if it fails while the car
> > is running.  Not necessarily true on earlier (MAC11) cars which have
> > a bug in the cylinder counting code if the hall sensor fails.
>
> Similar things happen on cars with one or more damaged flywheel teeth.  Flywheels with a single tooth broken off seem to be
> remarkably common - I've seen three in about the last year.

Does this set an error code?  I think it should, but I'd have to look
at the MAC11 code to be sure.

Orin.