Rotor Balance Test
WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
- High-voltage in ignition system can cause strong electrical shock which can result in serious injury. Avoid direct contact to the vehicle body during the rotor balance test.
- High-voltage spark will negatively effect the engine control. To prevent this, ground the high-tension leads and keep away from sensors and wiring harnesses.
CAUTION:
- Rotor balance test can overheat and damage the three-way catalytic converter.
NOTE:
- The purpose of the rotor balance test is to find weak or non-contributing rotors. In this test, the high-tension leads are disconnected one by one to shut off the ignition on each rotor with the engine running. By carrying out the rotor balance test, a total determination of the compression pressure, air/fuel mixture, and ignition is possible.
- Connect the WDS or equivalent to the DLC-2.
- Access the RPM PID.
- Start the engine.
- Remove high-tension lead from each rotor and monitor the RPM PID value.
- If the RPM PID does not drop, inspect the following:
- Fuel injector (FP1) (RP1)
- Spark plugs
- High-tension leads
- Ignition coil
- Compression pressure