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Yep battery was off the whole time. I did have to reset about 1000 "adaptations" in the various ecus but no love. I might pull the throttle body out and give it a clean but I'm not convinced. I don't get why it runs fine at higher revs. The cold start today was beautiful! -
Did you disconnect the battery for a while? It might need to relearn how to BMW, maybe????? -
My happiness was short lived. The car has a violently rough idle. If I get the revs up it runs really nicely albeit with some very small misses occasionally. I have checked and double checked all my connections and vacuum lines. I've even replaced some unrelated vacuum lines to to and find the problem. The codes are all over the place. Throttle position, throttle vacuum, o2 sensor 1, o2 sensor 2, occasional misfire code. Makes me think a wire has been broken or something isn't clipped in properly but there's so little around where I was working to miss plugging in or to break. Super weird. It's only at warm idle. Cold start is beautiful until the revs drop below 850 - 900 rpm then all hell breaks loose.
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Diff. Confirmed today. $5200 from BMW. 🤣 $2200 for a used one. $1000 for a refurbished one from China.
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