Cylinder #7 down on compression

@AJ covered it. If you don’t want to remove the valve train. You can spin the motor over in direction of rotation with a large breaker bar and socket on the balancer nut until the valves are close for the cylinder you are checking, and then do the next cylinder in the firing order. Leave the plugs in the other holes Will reduce the chance of the motor spinning when you hit it with air from the LD tester.