Tachometer doesn't work! :-(

[Orin Eman]

>
> At 9:28 PM -0800 12/16/01, Orin Eman wrote:
>
> >  > 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.
>
> On the 3B, yes(Bentley specifically mentions "missing teeth" as a
> possible cause of a bad flywheel sensor code.)  No idea on the MCII.

Yes, I've seen the code that does that in the 3B.  Just didn't remember
whether there was similar in the MAC11.

> And, while we're on the subject, if the check engine bulb is
> installed(this is, after all, a 89+, right?), both ECUs should, when
> the hall sensor goes south, pop a code and turn on the Beacon Of
> Despair, yes?

I don't know that they would all turn the light on.  They should store
a code though.  With one slight exception on the MAC11 where I think
there is a timing window where the hall sensor looks OK to one part of
the code but can be missed in another.

Orin.