Problem starting the e46 320d VP44

[carBlacken]

Greetings, everybody!

I own a VP44 fuel pump-equipped E46 320d, which is a pre-facelift model. Now that I fixed the leaky washers at the base of my injectors, I am unable to start the engine. 😎

It will turn over, but it will not start.

1) I have primed the pump under the seat for 40 seconds many times and verified that it is functioning.
2) The clear gasoline tubes that go from the fuel filter to the VP44 pump do not appear to have any air bubbles.
3) At the injectors, I have loosened the nuts to bleed the high-pressure fuel lines. Clear fuel streams out to a height of about 5 cm, with the exception of the injector nearest the front of the car, which seems slightly weaker.

4) I sprayed starting fluid into the intake and got the engine to start, but the initial start was rough and white smoke billowed from the tailpipe. Although there was less smoke and less force during the other starts, the engine still makes a loud knocking noise when started with starting fluid.

5. BMW Scanner 1.4 displays a flawless result.

So now I'm confused. I accidentally disconnected the red battery line in the engine compartment before removing the battery in the boot, so I'm wondering if the immobiliser is preventing the fuel pump from operating.

Can the immobiliser be verified or circumvented in any way? After this, what am I to do?

Many thanks

[carBlacken]

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[carBlacken]

https://www.amazon.co.uk/s?k=BMW&linkCode

[badgx]

I don't understand why the immobiliser would activate, but it sounds like gasoline starvation.
Perhaps other error codes could be revealed by a more comprehensive scanner.
I experienced a VP-44 failure myself; I parked the car, returned to it 30 minutes later, and it still wouldn't start.

[carBlacken]

After removing one injector and adjusting the metal fuel line to suspend it over the engine, I made sure that no fuel was spewing out of the other injectors.

The VP44 connector's ground and power are functional, as I verified.

First, air got into the system when the injectors were disconnected. Second, VP44 could be malfunctioning. Third, the immobiliser could be preventing it.

The VP44's unexpected failure coincides with the injector removal; therefore, tomorrow I will attempt to bleed the gasoline lines once more, since I do not comprehend why it would do so.

[Matt865]

Mine was functioning when I parked the car, but it has since stopped responding, so I'm hoping it's not the vp44.
When I think back on this difficulty from many years ago, I recall that we had to tow the automobile in order to start it, but I believe that was due to the fact that we didn't have alternative methods.
For some reason, the only thing that comes to mind is to give it a quick spray of brake cleaner or easy star for a couple of seconds.