It is common to run rough for a little while, but it should start. Not only the rail gets hot, but the injectors get even hotter so the fuel changes from liquid to vapor. The ZX had a cooling fan to try and remedy the problem. Adding alcohol to our gas has turned it from a slightly rough start to a really rough start since alcohol vaporizes at a lower temperature. I noticed that it gets worse in the winter and that is because winter fuel is designed to vaporize at a lower temperature than summer blends. That might be nice for our air, but it is bad for these cars which have no trouble at all vaporizing fuel. You also might have a fuel pressure leak that makes the problem worse. Try installing a pressure gauge or a push button going to the fuel pump relay so you can run the pump before starting. Of course, I'm also assuming that the fuel filter is fairly new, plugs, wires, cap, rotor, and timing, are fresh. You just give it some gas after starting until the idle starts to smooth out. Once it is in gear and traveling, everything is fine again. I'm currently assembling a simple cooling setup using a bilge blower in mine to avoid the hot start problem altogether. I will post it up once I get everything working properly. It should look clean and have a programmable timer so the fan comes on for X minutes after the engine is shut off. It only uses 2.5 amps.
Last edited by sactojohn; 03-20-2017 at 06:11 PM.