2004 x3 fuel problem

[jeanro]

Hi folks,
Need your help again, please: I have replaced the injectors (due to one leaking) in my 2004 X3, Manual transmission. After the install, the car started beautifully, but when I took it to a test drive I noticed that it would not rev higher than 2500 RPM. Turned back right away and managed to park in the garage where I went right away to troubleshooting the fuel system after noticing that there is no fuel pressure at the shredder valve. I have bypassed the fuel relay and I get the pressure up to 50 PSI, but when I turn the engine on, the pressure drops to zero, and the car dies. I can hear the fuel pump running continuously as the relay is bypassed, yet the pressure still drops to zero upon starting the engine.
Any ideas, please?
Thank you,
Jean

[jclausen]

Fuel pump

[jeanro]

Jclausen, judging by the simptoms....you are totaly right!!! I will clean the old injectors, put them back on, and if nothing changes, I'll go for the fuel pump. There's still a question nagging me: why did it start acting up after changing injectors?? Once gain, I agree with you and I will go ahead chasing that fuel pump. And, one more thing: I can hear the pump priming the fuel line for about 3 to 4 seconds after turning the ignition on. Is it possible that the pumps shaft is slipping on the impeller housing?
Anyway, thanks a lot for your input, and I'll keep you posted.
Cheers,
Jean