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Home >> Chevrolet >> 2006 >> Avalanche 2500 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 8.1L - Troubleshooting & Diagnosis >> Fuel Injector Balance Test with Special Tool >> Notes
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Fuel Injector Balance Test with Special Tool: Notes

Fig 1: Performing Fuel Injector Balance Test With Special Tool
GM17713Courtesy of GENERAL MOTORS CORP.
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 296 kPa (43 psi) 296 kPa (43 psi) 296 kPa (43 psi) 296 kPa (43 psi)
2nd Reading 131 kPa (19 psi) 117 kPa (17 psi) 124 kPa (18 psi) 145 kPa (21 psi)
Amount of Drop 165 kPa (24 psi) 179 kPa (26 psi) 172 kPa (25 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