Method B

Remove No. 4 ignition coil.

Fig 1: Removing No. 4 Ignition Coil
Courtesy of NISSAN MOTOR CO., U.S.A.
Connect No. 4 ignition coil and No. 4 spark plug with suitable high-tension wire as shown in Fig 2, and attach timing light clamp to this wire.

Fig 2: Connecting No 4 Ignition Coil And No 4 Spark Plug With Suitable High-Tension Wire
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Identifying Spark Plug Wire Electrode Dimensions
Courtesy of NISSAN MOTOR CO., U.S.A.
Check ignition timing.

Fig 4: Checking Ignition Timing
Courtesy of NISSAN MOTOR CO., U.S.A.