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      Can I install a Super Tach II or Super Tach II Mini on a DIS-equipped vehicle?  
      How can I connect a Sunpro tach to a Ford DIS-equipped vehicle?  
      The needle on my tach jumps around. What's wrong?  
      Can I install a Sunpro Tach on my motorcycle, boat, go-kart, food processor or other non-automotive engine?  
      Why won't the needle on my tach go to zero?  
      Does Sunpro make any tachometers that will work on a diesel engine?  
      I lost my tachometer instructions. What is the wiring color code?  
      Test Question 2  
  The needle on my tach jumps around. What's wrong?  
  • A loose connection, in the power, ground or tach signal wires can cause this behavior.

  • Check to see that all connection points are solid and well-insulated from other wires.

  • If your vehicle has a high-performance, aftermarket ignition system, this can cause erratic readings.

  • Most ignition makers offer a tach filter or adapter that provides a clean tach signal. Installing one of these adapters will usually solve the problem.

  • Solid copper plug wires can radiate electrical "noise" which can cause erratic tach readings.

  • Installing resistor plug wires and/or shielding the green tach lead can reduce this interference.
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