O2 sensor 1 in manifold controls fuel in relation to rear O2 sensor,ect switch also controls fuel in relation to temp,so possibly ect switch is faulty.
Cost : Little as possible.
Thanks : To those who by their generosity my build has progressed.
Its a handmade sports car not a flaming kit car !!!
If at first you dont succeed,avoid skydiving...
No parachute require to freefall,only if you want to do it twice.