Injection Nozzles

If engine starts, but idles roughly, check injection nozzles as described:

1. Start engine. Lessen injection line fitting at each nozzle, one at a time. Be sure to direct fuel away from sources which could cause fire.
2. If, when an injection line fitting is loosened, idle speed or quality does NOT change, replace that nozzle and repeat test.
3. Disconnect fuel return system from nozzles on one bank of engine at a time. Start engine and observe fuel seepage from each nozzle. Replace any nozzle that leaks excessively. Torque nozzle clamp bolt to 25 ft. lbs. (34 N.m).