Hey
I've own E7 JDM engine , ecu is MR560648 and the rom is 98640014 .
My fuel pump in the tank is not evo's original pump , but a cheaper pump , so i've added inline strong fuel pump. At idle my AFR is oscillating between 13-16 at warm engine. My fuel pump resistor isnt connected , FPR is original.
My AFR gauge is AEM with bosch WB sensor.
I think that the problem is from the dual fuel pumps the works without the resistor. any ideas? I need some combination with the pumps and the resistor , maybe two resistors one for each pump and relays to the ecu ?
maybe leaner fuel map?

Thanks

 

ever got this fixed?

 

Hey
No , i swapped to evo original fuel pump , but on a full throttle the engine still very rich , AFR shows 10 . Maybe the exhust pipe constricting flow ?

Thanks