I have a 1993 B18A1, and I changed out the manifold with another stock manifold cause it was manual, and I also had to change out the injectors and fuel rail.. After doing this the car started and I test drove it.. It has no power when you go, even when you floor it, it does nothing, just pulls slow... I tried to redo the vacuum lines, but still no luck.. What do you think that could be causing it to not get any power? I even disconnected the fuel and purge cut off valves... Still no luck... HELP...!!!!!