Test Description
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to step numbers in diagnostic procedure.
- 3 - A balance rate between -4 mm3 and +4 mm3 will not cause a driveability concern. A balance rate less than -4 mm3 , between 4 mm3 and 14 mm3 will cause a driveability concern without any DTCs. A balance rate of more than 15 mm3 will set a DTC.
- 5 - This step determines if ECM can control a stable fuel pressure. A high balance rate may be caused by a fuel injector or compression only if ECM can control fuel pressure.