The maximum engine speed is controlled by the ECM and cannot be adjusted by the vehicle owner. Below is a description of the speed check procedure, adjustment requires the use of special diagnostic equipment and its implementation should be entrusted to car service specialists.
1. Start the engine and warm it up to normal operating temperature.
2. Have an assistant engine compartment stop depress the accelerator pedal and check that the maximum speed is in accordance with regulatory requirements (see Specifications in Chapter Power supply systems, release and reduction of toxicity of exhaust gases).
Do not force the engine to rotate at maximum speed for more than two or three seconds!
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