Car running rough feel motor vibration inside car changed Maf runs better but slugish but still vibration shift hard smell of gas wife smelled it as i pulled of to test new maf. Gets up to speed but takes awhile ran whole can of Seafoam on a 1/4 tank thinking it was dirty got more gas now ofc but before that it would jerk during letting off Gas and if drove to far it would sputter almost die id feather peddle untill it took off like a bat out hell excuse the (meatloaf song) yes im older. And pretty good mechanic W/AMERICAN cars. any idea