Frontier 2WD V6-3.3L (VG33E) (2003)
-
Remove the air inlet tube upper and lower supports.
-
Remove the air inlet tube bolts, nuts, and studs. Position the air inlet tube aside.
^
Disconnect the evaporative emission vacuum hose.
^
Disconnect the brake booster vacuum hose.
^
Disconnect the TPS sensor electrical connector.
^
Disconnect the TPS switch electrical connector.
3. Check type and gap of new spark plug.
Spark Plug (VG33E)
Spark plug (VG33E):
Spark Plug (VG33ER)
Spark plug (VG33ER):
Use standard type spark plug under normal conditions.
The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions such as:
^
frequent engine starts
^
low ambient temperatures
The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under conditions such as:
^
extended highway driving
^
frequent high engine revolution