Re reading and noticed upallnight mention of MAF fixing trans failsafe. That's amazing to me. Ironic that if engine is low on power the "answer to that" is to make the transmission even harder to push. Just a funny aside.

One more touch on the ass u me concept. I didn't sense any malice and I think it was a succinct way to say: "I think you just interjected something that might not br true will take us all off course on an incorrect path and make all commentary from that point based on that statement foolish. We need to know if that statement is fact or conjecture".

(Using as a given that fuel pressure was determined to make sure only MAF to blame for the codes/transmission).

My repeat of the similar phrase was just a quote from the TV show Friends (Joey messing up the common ass u me and said "you know what they say about assumption. Makes an ass out of you and umption". It's common colloquial English to use the phrase "ass out of you and me" with no insult meant at all. I didn't see it that way eg it was not "not nice" for adult men to use the phrase pointed at each other especially when talking about cars being a pita to diagnose.

I was trying to point out it wasn't out of place for upallnight to use the common phrase to get to the bottom of: do we know or not what test was done before proceeding. Blunt is ok in my book. If my own brother does something dumb I'm going to call him on it by most likely this exact phrase: "hey dumbass". It's the most succinct way to get my point across it's not mean nor demeaning. Of he didn't call me a dumbass when I act like one I would think less of HIM. We are all morons at times. I own up to it plenty (and my last IQ test 15 years out of school was north of 150). It knows how to shut off completely at times "temporary moronity" I call it.

Based on follow up questions it appears that fuel pressure wasn't tested but with a Christmas tree of codes maybe it wasn't possible with defective MAF.

Knock out one thing at a time. It's more than just good news if the transmission isn't failsafe any more and if the only codes are lean both banks that leads to not injectors not coils so less expensive fix. Combining the trans code resolving and upallnight mention of metoo I think that was the next link on the chain. (battery, DISA, alternator, MAF).

OP's MO is to disappear for a week or so before having time to work on the car I suspect waiting for fuel gauge.

I didn't see a reply about what fuel line was disconnected. If the output and return were removed from the regulator and put on swapped it would easily cause the exact symptoms but be fixed instantly by swapping back.

I'm excited that this long haul may be close to resolition and OP can actually use the car!

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)