It sounds like there is some history like you are coming from another forum? Your first post ? and you don't have anything listed about the vehicle??
Quote:
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Compression is solid at 167 on cylinder 5, while the rest are around 165-170
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What the heck ??
Seafoamed the cylinder ??
I imagine fuel pressure is 50 PSI engine running and not with just key on ??
Get something that can scan BMW specific codes and post the descriptions.