Injectors have no power

[X5chemist]

Yes, I have that book in print. Works great as reference. Ask your local library. They can borrow books or get you one. I bought mine locally off Craigslist.

[2004bmwx53i]

Thank you

[X5chemist]

BMW MAF example: https://www.youtube.com/watch?v=542SX-bwyTc

The X5 will default to programmed values. The values will start and run it.

[2004bmwx53i]

Originally Posted by X5chemist

BMW MAF example: https://www.youtube.com/watch?v=542SX-bwyTc

The X5 will default to programmed values. The values will start and run it.

Thanks for the video. Sounded like me! I've removed the intake manifold. I plan to do the MAF as soon as I put it back together. I've lost the drive to resolve this problem.

[X5chemist]

Case study on X5 crank sensor.

https://www.youtube.com/watch?v=S1EmtwJh2o8

[2004bmwx53i]

Great diagnostics

[2004bmwx53i]

I eventually found out, the hard way, that fuel rail has to be bled. I just asked someone to start the engine while I pushed the pin on the Schrader valve to let the air out, and lo and behold, the engine started so beautifully. I've been going round and round searching like crazy. Nowhere did I see anyone mention this as a cause of crank no start. May this be of some value to someone in the future. I removed the intake manifold twice to no avail. At any case, I learnt a lot, and after a lot of frustration, I'm happy with the result.

[X5chemist]

Interesting. First time I've heard of it too. Since it is return less at the engine bay, I can understand why. However, firing injectors should let air out. When I do a CCV and coolant system hose replacement, I'll be sure to bleed out the air!
Thanks for sharing!