1978 280z should fuel cap be vented
I'm gonna say no. Beginning 1971 cars became required to be equipped with the evaporative loss system (1970 in California). The purpose of this system is to capture gas fumes & burn them with the air/fuel mixture instead of being released into the air. HTH. -Jim
I will confirm that the cap on these cars is not vented because of the evaporative system.
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