Xterra SE 2WD V6-3.3L (VG33E) (2002)
d. Remove the air inlet tube upper and lower supports.
e. Remove the air inlet tube bolts, nuts, and studs. Position the air inlet tube aside.
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Disconnect the evaporative emission vacuum hose.
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Disconnect the brake booster vacuum hose.
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Disconnect the TPS sensor electrical connector.
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Disconnect the TPS switch electrical connector.
Spark Plug
Spark Plug
3. Check type and gap of new spark plug.
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:
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frequent engine starts
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low ambient temperatures
The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under conditions such as:
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extended highway driving
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frequent high engine revolution