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How to wire up a tach to a VG30e


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  • 3 weeks later...

So I hooked up the Autometer tach to the ECU signal wire (blue/orange) and the tach is working, kinda. Inside the tach behind the light, there is a square box with two switches. I adjusted them appropriately for the 6 cylinder engine, 1= up, 2= down arrangement. I do have a moving needle but it is not accurate. It stays low and jumps a bit.

 

Here is the question: With the needle jumping and low position, is it likely a tach adapter is needed?

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