I own a 93 RX. Rebuilt the engine. MODS: Single Turbo, Jacobs box and coil, 850cc (p) 1300cc (s), and others.

Using EFI "piggy back" computer. Getting NO ERROR messages. Car starts (fuel pressure = aprox 45 psi, vac about 18) and will run fine at Idle and POT (using EFI adjustments). Car usually dies after 10 minutes, etc unless you increase RPM. Once it dies, it will not start back up unless the engine cools off (usually a few hours later). I tried a work-around from EFI (Push button switch for the fuel pump until the engine starts to turn over, but this still does not solve the problem.

Any suggestions will be very helpful.