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One of the first issues with the PFC is the "base map" which is intialized in the unit is not the best in the first place for injectors over 20-30% larger than stock.
This causes some issues to get a goo idle and good start up, driveability even if you enter in the correct lag times and correction values.
The maps are also extremely advanced, often too advanced for North American octanes that are readily available at the pump etc
If your Idle AFRs are too lean I would suggest adding some fuel in very small increments to the cells which the car is tracing under at idle.
You should see 14-15:1 at idle closer to 14.8:1 at the richest.
Although I have seen some cars with more aggressive cams prefer to idle richer at around 13:1 - but this is also more dependent on overly large injectors as well.
Sounds like you should be fine. The missing might just be caused by an overly advanced or very rough base map that isnt exactly fitting- check your plugs and ignition ground for good measure and try adjusting your IACV screw for a more robust idle with less drop off- this helps a lot with PFC cars
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