soga280z

yes Norm is at zcar and has been giving out gret info there, hes been helping with my resto.

ah good idea thanks.

hey guys, I've got this fuel issue narrowed down to a problem in the tank. If I bypass the tank and let the car run by siphening fuel from a container the car runs perfect. The minute the tank is used the car will run until the vacuum in the tank builds enough to stop the flow of fuel and even this new MSD fuel pump can not pull fuel. The return line is not blocked and the large hose on top of the tank is completely clear. The only slight resistance I can feel is in the smaller tube on top of the tank. I should note that I have used "redline" tank sealer recetly but used it exactly as the instructions said. Is there anyone that has seen inside a tank and is there something that I could have inedvertantly blocked? the plan tomorrow is to use muriatic acid to remove all of the redline possible. Just curious if anyone has had this same kind of result while using a tank sealer. Thanks everyone for all your help! I really appreciate it.

Hi all - 1978 280z has me stumped. During the troubleshooting I discovered extremely low fuel pressure. I changed the fuel pump (MSD 2225) and the pressure regulator. No help and the fuel pressure remains irradic. Is there any way the tank is creating a vacuum and not allowing fule to flow smoothly to the pump? I have blown air thru all the lines and they seem to be clear so I cant figure exactly what can be creating the vacuum. Has anyone seen this issue before? I have replaced all 6 leaky injectors, the fuel cap, tank has been removed and cleaned and sealed as well. Is this is a restoration for my son and we just cant seem to get past this fuel pressure issue. Any and all help will be greatly appreciated. PS I have a FSM but havent seen anything that addresses this issue. Keith