Starting the car
 

Ok guys im pretty new into the rotary FDs and I'm having an issue with my 93 FD. So the things that were done by the previous owner was a street port 13b with 850cc injectors on primaries and secondaries running on a Walbro 255 fuel pump and with a single T3 63mm. It was hooked up with a power FC but then he took it out ones the car was totaled along with the display HKS boost control. Ive tried to start it up with the stock ecu to see if it would've fire it up but it just turns over. But ones I plug in a power FC from my brother's rx7 stock twins it starts up but starts throwing out a lot of white smoke from the back and when I press on the gas it dies on me. And when I try to start it up again it wont start, it just turns over. What could be the issue here? Could've been flooded because it wont start again?