Download IGNITION TIMING Ignition timing is computer controlled and is not adjustable. Standard reference timing data for various engine operating conditions is stored in Engine Control Module (ECM) memory. ECM controls ignition timing based on engine operating conditions (speed, load, temperature, etc.) and data stored in ECM memory. ECM controls timing through ignition coil operation. BASE IGNITION TIMING (Degrees BTDC @ RPM) Application Accent (1.5L) Elantra (2.0L) Sonata 2.4L 2.5L Tiburon (2.0L) (1) Ignition timing is not adjustable. (1) Base Timing 4-14° @ 700-900 RPM 5-15° @ 700-900 RPM 3-7° @ 700-900 7-17° @ 600-800 5-15° @ 700-900 RPM.