My e38 ECU no longer has the FPCM since I went to a return-style fuel pump setup. My FPR is boost indexed, and should go up to around 82 PSI (at 22 PSI of boost).
1. Can a transducer be hooked up so that the ECU is again aware of the actual fuel pressure?
2. Since the ECU doesn't know the fuel pressure, wouldn't this cause the EQ Ratio to be wrong? (Wouldn't it cause it to be overly rich, since the fuel pressure is causing higher flow than the ECU is estimating)?