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Limitation of engine torque, 2x: General: Misfiring

To protect the turbo unit and the catalytic converter if misfiring should occur, the engine torque will be limited when there is a risk of overheating. The degree of misfiring that is allowed without engine torque limitation depends on the current operating point, engine speed and load.

Fig 1: Identifying RPM Pattern - Misfiring
G03819773Courtesy of SAAB-SCANIA OF AMERICA, INC.