Resurrecting a 530i auto

[Gianni682]

My father had a 530i with a 53 registration plate. Regrettably, he died two years ago, and due to dementia, ceased driving around 18 months before to his passing.

For several reasons, his automobile has been idle in his garage since that time. However, I have now focused on it, aiming to initiate progress and transfer it.

The vehicle starts and operates smoothly when the engine reaches around 1500-2000 rpm. However, if I release the accelerator and allow the engine to idle, it exhibits significant instability at 750 rpm, fluctuating in speed many times before stalling. When I gradually reduce the throttle till reaching idle, the engine remains somewhat unstable, exhibiting minor fluctuations in power, however it does not stall.

I have refuelled it, replaced the coolant, and installed a new battery.

Do you have any hypotheses or recommendations on the situation? I own a video of it, but I am uncertain whether I may upload it here. I will attempt it.

Thank you for your assistance.

[KOOLCAR]

You may need to upload the video to YouTube and thereafter provide the URL here.

[Gianni682]

I much appreciate the idea. That should have been considered. Completed as required. Here is the link:

[Gianni682]

 

[nickoyster4]

I empathise with your situation with your father; I had a similar loss a few years before.

Dementia is a dreadful condition.


I would investigate for an air leak.

[Gianni682]

Thank you for your response.

I am really sorry to learn that your father succumbed to dementia; it is a dreadful affliction that profoundly affects not just the individual but also has a significant and enduring influence on those who remain.


An air leak is a compelling proposition. Thank you for that.

[NAVITEL]

It may be an air issue; nonetheless, doing a code scan would be the most prudent approach.
In the absence of fault codes, we would be engaging in conjecture, which may incur significant expenses.