hi all , i have e34 535i from 88 ,i changed the engine i puted M20 1990cc engine.
after this my obc consumption indicate 30-35L/100km, it is not a real consumption of this ingine ,it consum about 13-14L/km, so how i can fix this problem ?, if anyone know pls help and if it is necesary if i changed the engine to change also the fuel pump?.
thank you in advance for any reply