Just installed b20. Ran fine until i installed my walbro. The pump wasnt clocked right so i went back to my b16 pump. Ever since ive changed the pumps, the car just bogs. No codes, i changed the ecu several times too, i checked injectors, filter, pump again and i get spark. Can anybody help me please.

 

after youve checked all the connections of the pump and all that. remplace your main relay wich controls the fuel pump.thats the only explanation for the info provided.