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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1558 (Engine Controls And Fuel - 3.5L (L66) - Troubleshooting & Diagnosis) >> Fuel Injector Balance Test with Special Tool >> Notes

Fuel Injector Balance Test with Special Tool: Notes

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Performing Fuel Injector Balance Test With Special Tool
GM17713Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 First Reading
2 Second Reading
Injector Balance Test Example

Cylinder 1 2 3 4 5 6
1st Reading 365 kPa (53 psi) 365 kPa (53 psi) 365 kPa (53 psi) 365 kPa (53 psi) 365 kPa (53 psi) 365 kPa (53 psi)
2nd Reading 245 kPa (36 psi) 200 kPa (30 psi) 245 kPa (36 psi) 240 kPa (35 psi) 245 kPa (36 psi) 255 kPa (37 psi)
Amount of Drop 120 kPa (17 psi) 165 kPa (23 psi) 120 kPa (17 psi) 125 kPa (18 psi) 120 kPa (17 psi) 110 kPa (16 psi)
Average Range: 117-137 kPa (16.5-19.5 psi) Injector OK Faulty injector - too much fuel drop Injector OK Injector OK Injector OK Faulty injector - too little fuel drop