Tip & How-To about BMW 325
A lot of people post us questions about misfiring motors and how they can be diagnosed. The simplest and fastest way to check a misfire is the "power balance" test. It takes a few minutes and can tell you a lot about what is going on in the motor. Here's how its done. With the motor idling, open the hood and listen to the engine for where the misfire is occurring, if you can't isolate the misfire, then remove the #1 spark plug wire. If the motor idles the same then this is the bad cylinder, If it idles worse then you need to repeat the sequence till you find it.
****WHEN REMOVING A SPARK PLUG WIRE WHEN THE MOTOR IS RUNNING HIGH VOLTAGE CURRENT IS RUNNING THROUGH THE WIRE! USE AN INSULATED PAIR OF PLIERS TO REMOVE THESE WHEN PREFORMING A POWER BALANCE TEST, AS ELECTRICAL SHOCK MAY OCCUR!***
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