Nissan Van L4-2389cc 2.4L SOHC (Z24i) (1988)
Fuel Filler Cap: Testing and Inspection
1.
Remove filler cap, wipe clean valve housing, and place cap
in mouth.
2.
Inhale air. A slight resistance should be felt at first but should disappear when valve can be heard clicking.
3.
If valve is clogged or no resistance is felt, replace cap.