10A - Injection Control Pressure Tests

10a. Injection Control Pressure Tests (Oil Aeration - Poor Idle Quality)

Purpose:

Injection Control Pressure Tests:

To determine if the engine lube oil is aerated and causing poor idle quality.

Recommended Procedure:

NOTE: The engine must be at operating temperature.

Install NGS Tester Turn A/C off. Access ICP PID on NGS Tester and monitor ICP pressure. Operate the engine at 3400 rpm for 3 minutes. This test should be performed with engine at normal operating temperature.

Possible Causes:
^ Extended oil drain intervals - the anti-foam additives in the oil may be depleted either from severe use or extended intervals.
^ Air may be present due to recent engine repair on injection control pressure system. It may be necessary to run the vehicle aggressively for 24-32 kilometers (15-20 miles) to remove air.
^ Wrong type or grade of oil.

Tools Required:
New Generation Star (NGS) Tester 007-00500 or equivalent