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.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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