Injector Coil Test Procedure (Steps 1-6) And Injector Balance Test Procedure (Steps 7-11) - Isuzu 2000 Trooper Workshop Manual

D An erratic voltage reading (large fluctuations in
voltage that do not stabilize) indicates an
intermittent connection within the fuel injector.
5. Injector Specifications:
Highest Acceptable
Voltage Reading
Above/Below 35°C/10°C
(95°F/50°F)
9.5 Volts
Injector Coil Test Procedure (Steps 1-6) and Injector Balance Test Procedure
CYLINDER
1st Reading (1)
2nd Reading (2)
Amount of Drop (1st
Reading–2nd Reading)
Av.drop = 166 kPa/24 psi
10 kPa/1.5 psi
= 156 – 176 kPa or
22.5 – 25.5 psi
NOTE: These figures are examples only.
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Acceptable Subtracted
Value
0.6 Volts
(Steps 7-11)
1 2
296 kPa 296 kPa
(43 psi) (43 psi)
131 kPa 117 kPa
(19 psi) (17 psi)
165 kPa 179 kPa
(24 psi) (26 psi)
OK Faulty, Rich
(Too Much
Fuel Drop)
7. The Fuel Injector Balance Test portion of this chart
(Step 7 through Step 11) checks the mechanical
(fuel delivery) portion of the fuel injector. An engine
cool-down period of 10 minutes is necessary in
order to avoid irregular fuel pressure readings due
to "Hot Soak" fuel boiling.
3 4
296 kPa 296 kPa
(43 psi) (43 psi)
124 kPa 145 kPa
(18 psi) (21 psi)
172 kPa 151 kPa
(25 psi) (22 psi)
OK Faulty, Lean
(Too Little
Fuel Drop)
6E–73
R262001
5 6
296 kPa 296 kPa
(43 psi) (43 psi)
131 kPa 130 kPa
(19 psi) (19 psi)
165 kPa 166 kPa
(24 psi) (24 psi)
OK OK