6C13G11
9-20
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Ignition system
Check the condition of the spark
plugs.
Clean, adjust, or replace the
spark plugs.
No
Check the ignition spark using
the ignition tester.
Yes
WARNING
• Do not touch any of the connections of the ignition tester leads.
• Do not let sparks leak out of the removed spark plug caps.
• Keep flammable gas and liquids away, since this test can produce
sparks.
No
Check the fuel system.
Good condition?
Yes
Yes
Repair or replace the spark plug
wire.
No
Check the resistance of each
spark plug wire and check the
spark plug caps for salt buildup.
Yes
No
Replace the ignition coils.
Good condition?
Good condition?
Check the ECM output peak
voltage.
Good spark?
Check the resistance of each
ignition coil.
Power unit
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