Powered by 2xAA batteries, e-Tune is 4-channel vacuum gauge used for balancing carburettors or throttle bodies on 2, 3 and 4 cylinder engines. Vacuum and balance measurements are shown as vertical columns on its back lit LCD.
e-Tune is entirely electronic, employing highly accurate and stable vacuum sensors. No mechanical gauges, fluids or moving parts are used.
e-Tune is user friendly having only two buttons. It works in two modes, vacuum and balance. Vacuum mode is used for initial adjustments. Balance mode is more sensitive and used for final adjustments.
Four silicone rubber tubes are included to connect e-Tune to the engine's vacuum tapping points. No restrictors are needed in the tubes, e-Tune uses a software algorithm to cancel vacuum pulses.
Here is a link to the e-Tune manual. https://app.box.com/s/kefkxqhc7qcz8978l63cs8mllxqmra41