2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 481
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -0.66 in) between the edge of the spark plug and grounded metal portion as
shown in the figure.
11. Crank engine for approximately 3 seconds, and check whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
CAUTION:
- Never place to the spark plug and the ignition coil within
50 cm (19.7 in). Be careful not to get an electrical shock while checking, because the electrical discharge voltage becomes 20 kV or more.
- It might damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.
NOTE:
When the gap is less than 13 mm (0.52 in), a spark might be generated even if the coil is malfunctioning.
Is the inspection result normal?
YES - GO TO 10.
NO - GO TO 7.
7.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark plug and the grounded metal portion.
Spark should be generated.
Is the inspection result normal?
YES - GO TO 8.
NO - Check ignition coil, power transistor and their circuits. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Ignition Signal/Diagnosis Procedure.
8.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
Is the inspection result normal?
YES - Replace spark plug(s) with standard type one(s). For spark plug type, See: Maintenance.
NO - Repair or clean spark plug. Then GO TO 9.
9.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace spark plug(s) with standard type one(s). For spark plug type, See: Maintenance.
10.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Remove fuel injector assembly. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Rail/Service and Repair/Removal and
Installation.
Keep fuel hose and all fuel injectors connected to fuel tube.
