Check settings
In the case of a wildly-wrong reading, see if the rev-counter has a switch on the back that allows it to be used on 4-, 6- and 8-cylinder engines. This is common on aftermarket accessories.
In the case of a wildly-wrong reading, see if the rev-counter has a switch on the back that allows it to be used on 4-, 6- and 8-cylinder engines. This is common on aftermarket accessories.