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| Illustration 1 | g00311324 |
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Delphi (Lucas) Fuel Injection Pump (1) Low idle adjustment screw (2) High idle adjustment screw | |
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| Illustration 2 | g00311363 |
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Stanadyne Fuel Injection Pump (1) Low idle adjustment screw (2) High idle adjustment screw | |
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Work carefully around an engine that is running. Engine parts that are hot, or parts that are moving, can cause personal injury. |
High Idle Adjustment for Type 1 Engines and 9RM Engines
Note: For a complete description of Type 1 and Type 2 engines, please refer to the Systems Operation, Testing and Adjusting Module, "Engine Design" for more information.
The adjustment for high idle must be made only under conditions with no load on the engine. The high idle rpm is found on the data plate on the side of the fuel injection pump.
Run the engine until the normal operating temperature is reached. Then check the maximum high idle. Use the high idle adjustment screw (2) in order to adjust the high idle. Loosen the locknut. Turn the screw in a clockwise direction in order to increase the rpm. Turn the screw in a counterclockwise direction in order to decrease the rpm. When the correct rpm is reached, tighten the locknut. Then, seal the screw.
Tamper Prevention on High Idle Adjustment for Type 2 Engines and 7BJ Engines
Note: For a complete description of Type 1 and Type 2 engines, please refer to the Systems Operation, Testing and Adjusting Module, "Engine Design" for more information.
High idle has been preset at the factory. The setting of the high idle of these engines should not be adjusted. Adjusting the high idle setting can void the following items: fuel injection pump warranty, engine warranty and emissions standards. A seal is installed on the high idle screw (2) in order to help prevent tampering. Adjustment of the high idle should be made only by personnel that have the correct training.
Run the engine until normal operating temperature is reached. Check the maximum high idle. High idle must be checked under conditions with no load on the engine.