flooding out FC3S4 N/A

[NoDOHC]

You should charge the battery before you try to start the car.

I am sure that you tried adding two-stroke oil to each rotor, but I thought I would ask.

Even with a terrible tune (3-bar MAP tune, 1 bar MAP) my '86 started just fine for the initial start on the Haltech.

If it ever wouldn't start, oil was the answer (although it did pulse to 100+ psi on all faces - without any oil).

(The tune is better now and oil is no longer necessary).

You could also try starting the car with the accelerator pedal floored (after clearing the flood and adding oil). If you can get it running, keep it running for a while, maybe it just needs to be run.

If it is the FPR, you should be able to install a gauge in the line from the primary injectors to the secondary injectors and verify that.

edit: You really should try pull-starting it too.