I have a 92 protege DOHC. The distributor, coil, MAFS, plugs and wires, fuel system cleaner have all been replaced and performed. My problem is that it will start running poorly and stumble on acceleration and not rev well. When turned off or allowed to stall (with clutch in) it will take a long time (probably 30+ minutes to restart). This is when it is at operating temp. What could be the problem? Thank you for your help!
-Anders

 

How does fuel pressure look. Should be around 34psi with vacuum line to pressure regulator connected and around 42 with line disconnected. Also check to make sure regulator diaphram is not ruptured and fuel is being sucked straight into the intake from the vacuum line.