Cylinder Balance Test Procedure

Purpose
The purpose of the cylinder balance test is to find weak or non-contributing cylinders. In this test, the high-tension leads are disconnected one by one to shut off the ignition in each cylinder while the engine is running. By carrying out the cylinder balance test, a total judgement of the compression pressure, air/fuel mixture, and ignition is possible.

WARNING:
- High voltage in ignition system can cause strong electrical shock. Avoid direct contact to the vehicle body during the cylinder 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 harnesses.

CAUTION: Cylinder balance test can overheat and damage the three way catalytic converter.

Procedure
1. Connect a tachometer to data link connector IG-.
2. Start the engine and let it idle.
3. Disconnect each high-tension lead and measure the engine speed.