Hit The Jackpot...a few questions...
Reply #11 –
And the old board spoke thusly:
[COLOR="Red"]TurboCoupe50
(6/3/02 5:41 pm)
Re: tach accuracy
When I still had the 4cyl tach in my TC after the engine swap, it read double the RPM's. I have found there is only one resistor that is different in the Turbo Coupe vs Sport tach. It is located near the minus (blue) wire to the tach movement. It is 100k ohm.
Changing it to a 75k for a 6 cyl or to a 50k for a 8 cyl should be close.
I'll get a pix up to show the resistor. [/COLOR]