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Re: [T3] Tach signal


On Sat, 2006-07-08 at 18:52 -0700, shalom@ucla.edu wrote:

> 
> I have a question about getting an RPM signal for a tach.  I have an FI 
> distributor so I have a connection with pins (21,12,22) that goes to 
> the computer.  Do I use either pin 12 and (22 or 21) to get the  RPM 
> signal?  Or do I get the RPM signal some other way (maybe like an 
> engine that is not FI)?  Does the distributor shaft turn 1 revolution 
> per 2 revolution of the crank shaft?
> 

You get your tach signal from the points side of the coil. If you have a
manual transmission made after 1969, you already have a wire run thru
the harness. It is a red wire that is running along with the oil
pressure switch wire. The other end comes out under the dash near the
fuel pump relay.
-- 
russw <russw@classicvw.org>

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