Updates
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#1 - This car has been stored several months at a time. I found a video talking about the possibility of bad fuel leading to misfires and symptoms that might falsely indicate a fuel pump problem. Putting this into the picture and I realized that the fuel may have some clogs in the delivery system. In this case I obtained some Royal Purple Max Cleaner and added it to my fuel tank. I drove the car for a while to make sure the fuel cleaner worked its way through the fuel system. As the fuel mixture worked its way through the lines, I felt the car definitely respond (always like a sound of a plumbing clog being cleared). The check engine symbol cleared and I started to see better idling and power responsiveness.

I am not sure this is the permanent fix. I will continue to monitor the situation. 


Original
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I have a 2012 Mini Cooper S Coupe with 55275 miles on it. About a week ago, when starting up the engine started having misfires. I have tried thinking through the problem, capturing frames from my BOSCH Bluetooth connector, and recording videos. I have noted the following behaviors:

- When cold cranking the startup is very rough (most of the misfires happen at this time)
- After an initial rough start the engine has been running relatively smoothly although it has been getting progressively worse each time I drive it locally
- I noticed that the plastic air tube going into the side of the engine below the main air filter (on the driver side) seems to have vibrated into a very loose condition near the back rear (I've tried to use my hand to vibrate it back into place but it doesn't seem tight enough to me)
- I have ordered and received the ignition coils, spark plugs, and oil filter so that I can swap them in after I check the air filter
- I noticed changes in the engine rpm when I change the amount of air that I use for the internal AC
- Noted random codes: P0300, P0301, P0302, P0304, P15DF
- When the car is on the road and stopped at a stop/red light the engine RPM idels at around 700-800RPM. 

**What I have done to prepare for the solution:**

- Watch videos for other people's assessment of these kinds of problems
- Gather basic tools necessary to address fire, air, fuel issues
- Develop a mental picture of the problem and define a plan to address the most obvious potential issues first

I understand that it certainly could turn out to be the high/low pressure fuel pump or a mechanical failure. I would like to know if anyone can offer any insight or tips. I have saved the video of my live data capture over a period of time in the hope that someone can point out anything that I have missed.

Other things I don't know but would likely be helpful:

- How can I adjust (increase) the engine idle RPM?
- What other things I should be doing
- How to adjust spark plugs or at least verify them before installation

[Live Engine Videos / Frame Captures / Live Data Captures][1] 

P.S. My nearest garage is talking about a $250 fee to look at the problem (not fix it) so that is never going to happen.

Thanks in advance for any assistance or recommendations.

  [1]: https://photos.app.goo.gl/S68K3x7oNwFm4c4s9