Mitsubishi MOTORS Space Runner 1998, Руководство по ремонту

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ENGINE ELECTRICAL -
Ignition System
16-27
5. Check that spark is produced between the electrodes of
the spark plug.
6. If no spark is produced, replace the ignition coil with a
new one and recheck.
7. If spark is produced with the new ignition coil, replace
the old one as it is faulty. If no spark is produced again,
the ignition circuit is suspected as faulty. Check the ignition
circuit.
SPARK PLUG CHECK AND CLEANING
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
4. Measure the spark plug insulation resistance. Replace
the spark plug if the measured value is lower than the
limit value.
Limit: 1 M
W
5. Clean the spark plug holes.
6. Install the spark plugs.
7. Install the ignition coils.