Trying to diagnose a fuel smell in car cabin? on 1998 Lexus ES300

Could either the fuel pressure damper assembly or the canister purge valve occasionally cause a gas smell to be blown into the car cabin via the AC vents when the air is not on recirculate? I've had this problem intermittently, mostly in summer, when it is hot and humid. Have already replaced the Charcoal canister, and valve cover gasket and all 12 gaskets for fuel injectors. Thanks.

Asked by for the 1998 Lexus ES300