Backlit large display for easy reading in any lighting condition
Supports 10 different crank types for versatile ignition system testing
Adjustable dwell and duty cycle outputs for precise ignition diagnostics
Cam sync output for DIS and EFI systems enables advanced testing
Spark plug tester included for comprehensive ignition system checks
Summarized by Shop
As engine technology changes so does the need for ignition systems and a way to test them. MSD's ignition tester now has the ability to test not only traditional single coil ignition systems but also coil-per-cylinder applications. The 89981 tester even gives you the ability to create an RPM run and let the tester run through the RPM rang