Question about 1997 Ford Expedition

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Tachometer wont work on a '66 mustang.

I installed a new $400 tach (called a rally pack) on a '66 'stang. it never worked right. goes to 1500 & stops. i later realized it had a G.M. HEI ign. system. i know the old ford system works off the positive side of the coil (unlike any other systems). does any one know a solution to this mismatch?

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Iam pretty sure u need a resitor a 300 ohm in between on the wire from the coil. keep in mind some dist have a tack wire some have not all

Posted on Mar 05, 2009

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