Fuel Injector Balance Test-Fuel Pressure Test

WARNING: This page is about a different variant/trim than selected.

Install a fuel pressure gage. Refer to Fuel Pressure Gage Installation and Removal .
Turn ON the ignition, with the engine OFF.

IMPORTANT:

The fuel pump relay may need to be commanded ON a few times in order to obtain the highest possible fuel pressure.
DO NOT start the engine.

Command the fuel pump relay ON with a scan tool.
Observe the fuel pressure gage with the fuel pump commanded ON. The fuel pressure should be 345-414 kPa (50-60 psi).
- If the fuel pressure is not 345-414 kPa (50-60 psi), refer to Fuel System Diagnosis .
Monitor the fuel pressure gage for one minute. The fuel pressure should not decrease more than 34 kPa (5 psi).
- If the fuel pressure decreases more than 34 kPa (5 psi), refer to Fuel System Diagnosis .
Perform the Fuel Injector Balance Test with Special Tool or the Fuel Injector Balance Test with Tech 2.