If the "Pop" was a significant backfire.........Could this have taken out the MAF?
Possibly caused by dodgy MAF which is now Dead?
I know you say you replaced it, but was it with new? was it a "Really real" Bosch MAF?
When the Maf on Bolt went out, it started with a couple of backfires, then just ran like crap, turned on the CEL and tossed all kinds of codes about rough road misfires, Catalyst damaging misfires, etc.
As it went out very suddenly while I was using it to shift a dozen or so loads only about 200 yards up
and down the property, it never occurred to me it was MAF.
I suspected water in the fuel, or bad fuel as it had sat for 3 years in the shed whilst I played in Oz on the boat.
I did fuel flush, plugs and leads (Plugs did not look good) hoping this was it, but the problem came right back.
First MAF I got said Bosch on the box, but was a knock off and did not fix the issue.
In the end, a new Genuine Bosch MAF and it was instantly fixed!
Do beware, BTW.....I bought a "Certified Genuine Bosch" part from Amazon which upon inspection was missing
the hologram sticker and code to check that it was genuine. It did not work. Returned it, and got another
from fleabay, which was indeed the correct part.....
Something to watch out for although I know all of you are savvy about knock off parts.