Resistive Cord Check <Mpi; Spark Plug Check And Cleaning - Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement

ENGINE ELECTRICAL –
4. Connect the spark plug outer electrode to earth, and then
crank the engine.
5. Check if the spark plug sparks.
6. If the spark plug does not spark, replace the ignition coil
with a new one and recheck.
7. If the spark plug sparks when the new ignition coil is used,
the ignition coil to be checked is defective. Replace the
ignition coil.
If the spark plug does not spark when the new ignition
coil is used, the ignition circuit may be defective. Check
the ignition circuit.
RESISTIVE CORD CHECK <MPI>
Measure the resistance of the all spark plug cables.
1. Check cap and coating for cracks.
2. Measure resistance.
Limit: Max. 22 kΩ

SPARK PLUG CHECK AND CLEANING

<GDI>
Caution
1. The spark plug gap for iridium plugs should not be
adjusted.
2. Cleaning iridium plugs may result in damage to the
iridium tip. Therefore, if cleaning is necessary because
the plug is sooty, use a plug cleaner, and do not clean
the plug for more than 20 seconds in order to preserve
the electrodes. A wire brush should never be used.
3. The spark plugs in GDI engines are special iridium
plugs in which the electrodes can become black even
when the plugs are working normally. Carbon which
may become deposited on these plugs burns off more
readily than with conventional plugs, and so should
not cause any problems with spark plug performance.
Judgement of whether a spark plug is operating
normally or not should be made by checking the
insulation resistance.
1. Remove the ignition coils.
2. Remove the spark plugs.
3. Check the spark plug gap. Replace the spark plug if the
gap exceeds the limit.
Limit: 0.75 mm
Standard value: 0.5 – 0.6 mm
Ignition System
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