Summary

It is possible that minor calibration faults in key system inputs can have a significant effect on calculated spark advance, resulting in degraded driveability. When performance problems arise which appear to be the result of inaccurate timing advance calculation, do not overlook calibration of all relevant input sensors which influence timing during the affected driving mode. The best way to confirm sensor calibration is by becoming familiar with, and performing, the ECU Standard Voltage Check procedures.

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