Mitsubishi Lancer Evolution 7. Manual — part 233
ENGINE ELECTRICAL -
Ignition System
16-31
STANDARD WAVEFORM
Observation Conditions
Function
Secondary
Pattern height
High (or Low)
Pattern selector
Raster
Engine revolutions
Curb idle speed
kV
Secondary
ignition
voltage
waveform
Ignition voltage
(point D)
Dwell
section
Point C
Spark line (point A)
Wave damping
reduction section
(point B)
Time
Observation Condition (The only change from above condition is the pattern selector.)
Pattern selector
Display
Secondary
ignition
voltage
waveform
kV
No. 4 cylinder
No. 2 cylinder
ignition noise
No. 1 cylinder
No. 3 cylinder
ignition noise
Neutral section
0
2
Time
ENGINE ELECTRICAL -
Ignition System
16-32
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
ENGINE ELECTRICAL -
Ignition System
16-33
EXAMPLES OF ABNORMAL WAVEFORMS
Abnormal waveform
Wave characteristics
Cause of problem
Example 1
01P0215
Spark line is high and short.
Spark plug gap is too large.
Example 2
Spark line is low and long, and is
sloping.
Also, the second half of the spark line
is distorted. This could be a result of
misfiring.
Spark plug gap is too small.
Example 3
Spark line is low and long, and is
sloping. However, there is almost no
spark line distortion.
Spark plug gap is fouled.
Example 4
Spark line is high and short.
Difficult to distinguish between this
and abnormal waveform example 1.
Spark plug cable is nearly falling off.
(Causing a dual ignition)
Example 5
No waves in wave damping section.
Layer short in ignition coil
ENGINE ELECTRICAL -
Ignition System
16-34
IGNITION COIL
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
Center Cover Removal and Installation (Refer to GROUP 11A - Camshaft and Camshaft Oil Seal.)
10 ± 2 N·m
1
2
25 ± 4 N·m
3
4
1
4
5
10 ± 2 N·m
Removal steps
1. Ignition coil connector
2. Spark plug cable No.1
3. Spark plug cable No.3
4. Ignition coil
5. Spark plug
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст