Spark Plug Check, Cleaning And Replacement; Camshaft Position Sensor Check; Crank Angle Sensor Check; Detonation Sensor Check - Mitsubishi Lancer Evolution-VII Workshop Manual

SPARK PLUG CHECK, CLEANING AND REPLACEMENT

SPARK PLUG GAP CHECK
Caution
1. Do not adjust the gap of the iridium plug.
2. Cleaning of the iridium plug could damage the tip of the electrode. Thus, if the plug must
be cleaned because of soot, etc., use a plug cleaner and clean within a short time of 20 seconds
or less to protect the electrode. Do not use a wire brush, etc.
3. Even when the functions of the iridium plug are normal, the electrode section may be blackened.
However, the adhered carbon has properties that easily burned off compared to the conventional
type, so there is no problem. Check the quality of the spark plug by checking the insulation
resistance.
Check the plug gap, and replace if the checked value is more than the limit value.
Standard value, limit value:
Maker
NGK
DENSO
ENGINE ELECTRICAL -
Model
IGR7A-G
VW22PR-DA7
SPARK PLUG INSULATION RESISTANCE CHECK
Measure the insulation resistance of the spark plug, and
replace if the measured value is less than the limit value.
Limit value: 1 MΩ

CAMSHAFT POSITION SENSOR CHECK

Refer to GROUP 13A - Troubleshooting.

CRANK ANGLE SENSOR CHECK

Refer to GROUP 13A - Troubleshooting.

DETONATION SENSOR CHECK

Check the detonation sensor circuit if self-diagnosis code,
No. 31 is shown.
NOTE
For information concerning the self-diagnosis codes, refer
to GROUP 13A - Troubleshooting.
Ignition System
Standard value (mm)
0.6 - 0.7
0.6 - 0.7
16-29
Limit value (mm)
0.75
0.75