My 1972 240z is suffering from fuel percolation during traffic jams and traffic lights. In addition to the stock heat shield which was installed in the car by the Factory originally, i have mounted a two Stainless Steel heat shield extension that reaches the bottom of both 3 screws SU Carburetor float bowls. However, the fuel percolation is still present. The gasoline in my country, Panama, has no ethanol so this should not be happening. The heat comes directly from the manifold and thus there must be away of lowering that amount of heat so it does not affect the fuel that is inside the float valves and that will evaporize and consequently shut the engine down. Other owners only throw out ideas such as swapping metal fuel rail with 5 inch rubber hoses, i have already done this and the percolation is still present. how do i avoid the car idle becoming lumpy at traffic jams which leads to a sudden shut down of the engine? WOuld installing a 280zx injector cooling blower solve this? The heat in my country is 32°C and lots of traffic.
Edited by jalexquijano, 23 May 2017 - 02:45 AM.