tachometer signal

[Richard Hoffman]

This isn't going to work for me as I have no distributor to take advantage
of.

So to be clear: the typ89 5-cyl tachometer uses a square wave, 2.5 pulses
per revolution?  Or does it take an independant signal from the ECU?  What's
going on here?  I don't have an occiliscope to check this stuff out :)

Thanks for the input!
Richard
----- Original Message ----- 
From: "Jim Green" <jeg1976 at yahoo.com>
To: "Richard Hoffman" <billzcat1 at hotmail.com>; "Alan Pritchard"
<apritchard at seaeye.com>; "Quattro List (E-mail)" <quattro at audifans.com>
Sent: Monday, December 01, 2003 1:07 PM
Subject: Re: tachometer signal


>
> --- Richard Hoffman <billzcat1 at hotmail.com> wrote:
> > This is a much better way to phrase the question I
> > was trying to ask, but I
> > was quite tired when I wrote my email!  What sort of
> > tach signal would be
> > needed in the typ89?  This is (of course) for my EFI
> > project as well.
> > Thanks in advance!
> > Richard
>
>
> Guys, the signal from the 5 window hall sensor on the
> didtributer might work.  It should be a pretty nice
> square wave.  I'm pretty sure I had it running that
> way at some point.  Just make sure and hook up the
> tach input to the autocheck system also so that you
> don't get those pesky oil pressure warnings.
>
>
>
> =====
> Jim Green
> '89 80q slow
> '89 90tq fast, really fast
> http://www.mswanson.com/~jgreen/car_home.html
>
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