The following are some problems caused by faulty injectors:
-Engine is hard to start or will not start
-Rough engine operation and idle
-Engine will not have full power
-Excessive exhaust smoke
Disconnect the fuel return hoses (Item 1) [Figure 70-70-26] from the injectors.
Disconnect the high pressure fuel lines (Item 2) [Figure 70-70-26] from the fuel injectors and from the injection pump.
Remove the high pressure fuel lines from the engine.
Remove the four retainer bolts from the top of the fuel injectors (Item 1) [Figure 70-70-27].
Remove the fuel return tube (Item 2) [Figure 70-70-27] from the fuel injectors.
Remove the injector nozzle holder bolt (Item 1) [Figure 70-70-28] from the cylinder head.
Pull on the injector nozzle to remove the injector nozzle from the cylinder head.
Installation: Tighten the nozzle holder bolt to 18.8 – 21.7 ft.-lb. (25,5 – 29,4 Nโขm) torque.
[Figure 70-70-29] shows the injector nozzle removed from the cylinder. Inspect the injector and replace if necessary.
Check and replace the injector nozzle O-rings (Item 1) and the nozzle washer (Item 2) before installing new or used injectors. [Figure 70-70-29].
