To vent, or not to vent (gas cap)
When I bought my 1993 Fleetwood Coronado (Chevy P32 454) last year, the previous owner told me that he had put a locking gas cap on to prevent a neighbor from stealing his gas. I like the idea of a locking gas cap, but it might be causing me some issues. I notice that after driving for a while, when I remove the gas cap, there is a noticeable vacuum sound, so obviously, this is not a vented cap. Should it be? I've had one instance of vapor lock on a particularly hot day driving through hills in south/North Carolina. Also, my generator has shut down while driving, and wouldn't start again until the RV sat for a while not running. Does anyone know if the original gas cap on this RV was vented, or is that vacuum supposed to be there?
1993 33' Pace Arrow
454 FI P30 Chassis