How to do a Power Balance Test

When the cylinder seems to be misfiring (on quick way to know this is by putting your hand on the exhaust, if is not blowing steadily a misfire is the most likely cause) a power balance Power Balance test could tell us which is the cylinder misfiring.

Difficulty: Easy Instructions

Things You'll Need: Basic Tools 1 When the cylinder seems to be misfiring (on quick way to know this is by putting your hand on the exhaust, if is not blowing steadily a misfire is the most likely cause) a Power Balance test could tell us which is the cylinder misfiring. Proceed with the following steps. 2 With the engine running, start disabling each cylinder. To disable a cylinder, either disconnect a coil, or an injector. The most professional way to do this is with a scan tool. 3 Each time you disable a cylinder you should see a drop in the RPM. If there is not a drop in RPM with a cylinder, then that's the cylinder at fault.