Inspection Of High-Tension Cord; Inspection Of Spark Plug; Inspect Electrode - Toyota MR2 1988 Repair Manual

IGNITION SYSTEM - On-Vehicle Inspection
IG-5
~10087
Ground
IG0147
IG0148
INSPECTION OF HIGH-TENSION CORD
1. CAREFULLY REMOVE HIGH-TENSION CORDS BY
THEIR RUBBER BOOTS
CAUTION: DO NOT pull on the cords or bend the
wires. The conductor inside may be damaged.
2.
INSPECT RESISTANCE OF HIGH-TENSION CORD AND
DISTRIBUTOR CAP
Using an ohmmeter, check that the resistance does not
exceed the maximum.
Maximum resistance:
25
k!l/cord
If more than maximum, check the terminals, and replace
the high-tension cord and/or distributor cap as required.
INSPECTION OF SPARK PLUG
(Platinum Tipped Spark Plug)
CAUTION:
• Never use a wire brush for cleaning
• Never attempt to adjust gap on used plug
• Spark plugs should be replaced every 60,000 miles
(1 00,000 km)
1.
INSPECT ELECTRODE
(a) If using a megger (insulation resistance meter):
Measure the insulation resistance.
Correct insulation resistance: More than
10
M!l
If less than 1 0 M
0,
proceed to step 2.
(b) If not using a megger:
Quickly race the engine to 4,000 rpm five times.
Visually inspect the spark plugs.
If the electrode is dry ..... Okay
If the electrode is wet ..... Proceed to step 2.