LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Saab >> 1987 >> 900 L4-1985cc 2.0L >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Description and Operation >> Ignition Timing Control >> Load Dependent
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Load Dependent

Fig. 81 Load Dependent Ignition Timing Control:





*** UPDATED BY TSB # 1085791 Oct. 85

When the engine load exceeds a predetermined value stored in the ECU, the ignition timing will be retarded 6° for all cylinders at the same time. The timing will advance again in 1° steps per engine revolution when the load has decreased or levelled off. See Fig. 81 for a chart of the actions performed.