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Home >> Buick >> 2007 >> Allure CXS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.6L - Troubleshooting & Diagnosis >> Fuel Injector Balance Test with Special Tool >> Notes

Fuel Injector Balance Test with Special Tool: Notes

Fig 1: Performing Fuel Injector Balance Test With Special Tool
GM17713Courtesy of GENERAL MOTORS CORP.
Callouts For Fig 1

Callout Component Name
1 First Fuel Pressure Gage Reading
2 Second Fuel Pressure Gage Reading
Fuel Injector Balance Test Example (Typical)

Cylinder 1 2 3 4
1st Reading 360 kPa (52 psi) 360 kPa (52 psi) 360 kPa (52 psi) 360 kPa (52 psi)
2nd Reading 155 kPa (22 psi) 111 kPa (16 psi) 155 kPa (22 psi) 249 kPa (36 psi)
Amount of Drop 205 kPa (30 psi) 249 kPa (36 psi) 205 kPa (30 psi) 151 kPa (22 psi)
Average Range: 156-176 kPa (22.5-25.5 psi) Injector OK Replace fuel injector - too much fuel pressure drop Injector OK Replace fuel injector - too little fuel pressure drop