93 FD Intake, Exhaust, Apexi tune. 4500miles on motor. 1000 miles on new injectors. 500 miles on new coils. It started happening at the beginning of December, Cold start the car will fire up without an issue. Once car gets fully warmed up car becomes near impossible to start. It will crank and crank and stutter but nothing until the 3rd or 4th time and even then try to die again unless you rev the motor to "clear" it. I've brought down the cranking pulse length on the PFC without any difference. Has anybody run into this problem before???

 

sounds like a tuning problem,which can be addressed in the Apexi PFC section.They know their stuff there!

 

Have you checked compression to rule that out?