Mitsubishi MOTORS L200 1996, Руководство по ремонту

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ENGINE ELECTRICAL –
Ignition System
16-6
WAVEFORM OBSERVATION POINTS
Point A: The height, length and slope of the spark line show the following trends (Refer to abnormal
waveform examples, 1, 2, 3 and 4).
Spark line Plug gap Condition of
electrode Compression
force Concentration of
air mixture Ignition timing Spark plug
cable
Length Long Small Normal Low Rich Advanced Leak
Short Large Large wear High Lean Retarded High
resistance
Height High Large Large wear High Lean Retarded High
resistance
Low Small Normal Low Rich Advanced Leak
Slope Large Plug is fouled – – – –
Point B: Number of vibration in reduction vibration section (Refer to abnormal waveform example 5)
Number of vibrations Coil and condenser
Three or more Normal
Except above Abnormal
Point C: Number of vibrations at beginning of dwell section (Refer to abnormal waveform example 5)
Number of vibrations Coil
5–6 or higher Normal
Except above Abnormal
Point D: Ignition voltage height (distribution per each cylinder) shows the following trends.
Ignition
voltage Plug gap Condition of
electrode Compression
force Concentration of
air mixture Ignition timing Spark plug cable
High Large Large wear High Lean Retarded High resistance
Low Small Normal Low Rich Advanced Leak