That’s why I went with a in tank Pump With fuel return always had issues in summer with vapour lock new mechanical pump failure, insulated fuel lines and phenolic spacer in the engine bay did help but man in traffic I would be sweating the car would stall than sitting it out for it to cool down. You could have some crap on your tank pick up restricting fuel flow. Doc you using Ethonol mix fuel ? With that buzz sound in your coil is there any cracks around the front plastic section ?