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Multiple Misfire Codes - Sparkplugs, Coils, HPFP?
I have been doing some research and it seems every thread has a difference answer. I am hoping if I lay everything out here someone else will be able to point me in the right direction.
I started the car yesterday and it was idling very rough, SES light comes on, really rough power while driving for the first couple minutes. Pull over, shut it off for a few minutes, turn it back on and it seems basically normal. Did a short and long drive later that day and nothing unusual other than the SES light still on.
Started the car up again today, same exact thing, except this time it stalled a few times. Turned it off and back on again, seemed to run smoother but not perfect. Went for another drive later in the day (just now) and it seemed normal except for the light.
The drive just now was to the go Autozone to read the codes. P0300, P0301, P0302, P0303. Lots of misfires.
So what I am looking at hear? HPFP? Sparkplugs? Coil?
Some more detail that may or may not help:
-new to me 2010 135i with Dinan S2 tune and 30,000 miles
-the last two mornings were on the cooler side, in the 50's (Boston)
-the car has never needed (according the previous owner and service records) anything replace, sparkplugs, coils, HPFP, etc.
Thanks in advance.
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