Technician A says winter-blend fuel used in a vehicle during warm weather can cause a rough idle and stalling because of its lower Reid vapor pressure (RVP). Technician B says abnormal combustion (detonation or spark knock) increases both the temperature and the pressure inside the combustion chamber. Who is right?
◦ Technician A
◦ Technician B
◦ Both technicians
◦ Neither technician