[bmwdiag123]

Hello, I have a BMW X3 F25 and in this car the previous High Pressure Fuel Pump was damaged due to some dust particles and I have changed the HPFP to a upgraded HPFP along with the upgraded injectors and everything. But now the car doesn't start and is shows a warning "249300 : Rail pressure monitoring on engine start: Rail pressure too low during engine starting". But when I disconnect the fuel monitoring socket from the HPFP then car is able to start and then it shows another error code "250100 Fuel quantity control valve activation : Open circuit". So can anyone help me increase the fuel pressure required for this upgraded High pressure Fuel pump.


ECU FILES

[MSport_Jon]

You are probably better off heading to the F30 forums. Very few people in here have tuned their X3's.

[bmwdiag123]

Originally Posted by MSport_Jon

You are probably better off heading to the F30 forums. Very few people in here have tuned their X3's.

Yeah I thought the same too. But was thinking if my post will get deleted for posting it in the wrong forum.

[n55david]

Originally Posted by bmwdiag123

Hello, I have a BMW X3 F25 and in this car the previous High Pressure Fuel Pump was damaged due to some dust particles and I have changed the HPFP to a upgraded HPFP along with the upgraded injectors and everything. But now the car doesn't start and is shows a warning "249300 : Rail pressure monitoring on engine start: Rail pressure too low during engine starting". But when I disconnect the fuel monitoring socket from the HPFP then car is able to start and then it shows another error code "250100 Fuel quantity control valve activation : Open circuit". So can anyone help me increase the fuel pressure required for this upgraded High pressure Fuel pump.


ECU FILES

You didn't need all that unless you're doing a custom turbo setup.. but okay

What hpfp and what injectors?