UPDATES

• 2: I ended up changing the HPFP which I got from eBay for half, the ignition coils, oil filter, air filter, spark plugs, and I put in the bypass for the faulty airbag sensor (all thanks to Youtube University - YTU). I am still getting p0087 and p15df on the mini but the misfires are not happening any more. The pickup is good. I will have to test the cold start again in the morning.

• 1: I was able to get a good look at the side intake tube and the MAF on the upper air intake tube. I checked my ignition coils for loss of power and they all created a loss in performance (but I'll probably switch them out with the spark plugs). The behavior of the car is that on start up it struggles and I am seeing p0087 and P15DF. If I throttle the engine up then it stops struggling and eventually settles down into a smooth rhythm. All restarts and running are good for the rest of the day. Each morning the rough startup begins again. I am considering the High Pressure Fuel Pump (HPFP) may be bad or a blockage in the fuel line or the fuel injectors.

• Is there any way to clear these parts without buying a new one? The HPFP is especially expensive for this car (~$650).

• Any new insights based on the new information?

ORIGINAL

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

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.