First Gen tachometer

[Jeepsandrangers]

Wired in a tach into my 85 Ranger, tapped into the dark green-yellow striped wire on ignition coil as I saw on forum before. The tach works,, kind of,, it is reading probably double the real output. Any ideas why that might be ? Appreciate the help guys


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[adsm08]

There were two signal posts on that tach. One for 4-cyl, one for 6. You are probably on the wrong one.

 

[Jeepsandrangers]

Sorry, not exactly sure what you mean. . But It’s an aftermarket tachometer.

I did double check the dial on the backside was set to 4


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[adsm08]

Sorry, not exactly sure what you mean. . But It’s an aftermarket tachometer.

I did double check the dial on the backside was set to 4


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Well your first post implied that you were using a factory unit.

You may have a faulty unit. Flip the switch to 8 and see what it does.