slider rx7

I did not clean the injector before installing the engine as it ran fine in the cut, I am using the standard computer and have an intank walbro pump. I have the BOV vent to atmosphere I installed a new water pump and timing belt prior to installing the motor

you have to crank it like bitch then it splutters to life, and is running rich

I have a 180sx with a rb20 conversion just completed, it is very hard to start and runs very rich when gets going. I have given it a compression test and get 145 across all 6 cyclinders, where do I start this is my first attempt at playing with an RB motor. Cheers Guys