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DiscoQuinn i completely feel your pain with these fa20s. The throttle "delay" as I call it is also my #1 frustration with these cars.
Sadly, it can only be remedied with an aftermarket ECU as I understand. Its just impossible to get rid of the 200ms (ish) delay from off to on throttle transitions with the stock ECU. I guess it does a bunch of calculations before it starts to move the throttle plate relative to your pedal position.
That said, there COULD theoretically be another solution, but it'd take some good programming and wiring skills. You could use a microcontroller that directly trsnslates your pedal movement to throttle plate movement while also mimicking the throttle pedal and throttle plate positions that the ECU is expecting. Essentially it would trick your ECU into thinking it's getting an acceptable pedal and throttle position reading. This should prevent any limp home conditions assuming it's coupled with an appropriate remapping of the ROM.
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