Ignition System; On-Vehicle Service; Ignition Coil With Built-In Power Transistor Check; Spark Plug Check, Cleaning, And Replacement - Mitsubishi Lancer Evolution-IV Workshop Manual

16-4

IGNITION SYSTEM

ON-VEHICLE SERVICE

1. IGNITION COIL WITH BUILT-IN POWER TRANSISTOR CHECK

Secondary coil resistance measurement
Standard value: 15 – 21 kΩ

2. SPARK PLUG CHECK, CLEANING, AND REPLACEMENT

Check the plug gap and replace if the limit is exceeded.
Caution
(1) Do not attempt to adjust the gap of the platinum plug.
(2) Cleaning the platinum plug can damage platinum tips. If a cleaning is needed, use a plug
cleaner and finish cleaning within 20 seconds to protect the electrodes. Never use wire brushes.
Standard values and limits:
Manufacturer
NGK
DENSO
ENGINE ELECTRICAL –
Model
PGR7A
P22PR8
Ignition System
Standard value (mm)
0.7 – 0.8
0.7 – 0.8
Limit (mm)
0.95
0.95