GM Service Manual Online
For 1990-2009 cars only

Object Number: 17713  Size: SF
(1)First Reading
(2)Second Reading

Injector Balance Test Example (Typical)

Cylinder

1

2

3

4

5

6

1st Reading

296 kPa (43 psi)

296 kPa (43 psi)

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)

131 kPa (19 psi)

130 kPa (19 psi)

Amount of Drop

165 kPa (24 psi)

179 kPa (26 psi)

172 kPa (25 psi)

151 kPa (22 psi)

165 kPa (24 psi)

166 kPa (24 psi)

Average Range: 156-176 kPa (22.5-25.5 psi)

Injector OK

Faulty injector - too much fuel drop

Injector OK

Faulty injector - too little fuel drop

Injector OK

Injector OK