Rodney's kits do not come with a preloaded map the last i checked but something may have changed. with the MS you will be able to run 15psi with the proper tuning. You WILL need to tune the MS regardless of who makes it for you.

As far your Fuel cut, I would need to know what you are using as a voltage clamp on the Map sensor. Missing Link, electronic FCD, or greddy e-manage ect?

unless your car is a 95 (or some 96's) you will need to keep the ECU from seeing any voltage over 4.70v for more than 2 secs.

Terry