S300 b18c gsr

[platinumsof2]

So I got this em1
Rebuilt everything car runs great with a b18b ecu
N I used to used a p75 with s300 map for gsr but it wouldn't. Start after 7 or 8 attempts it will start n die. N start n run after warming up it will run decent
Now next. Morning it won't start at all it will kep the battery n won't start. Even if I put a jumper nothing I can smell fuel
N some time it sounds like it fire ups n dies
Another person told me I cant use the gsr map because is not vtec ecu now I used a b18 map n the car ran great for a day same thing in the morning it died n didnt. Start I connected my b18b n starts rite up
I am going crazy thinking is the ecu or my s300
Any help would. Be apriciated.
1999 em1 ebp b18c jdm golden eagle fuel rail short ram intake fully rebuilt