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Message: <blockquote data-quote="Game-R" data-source="post: 626596" data-attributes="member: 27709">The knocking sounds can be caused by an incorrect fuel mix as well. This was also a problem in my E46 where it was traced to a leaking PCV hose. Try checking for cracks or failed seals for all the intake manifold, it's related tubes and their connectors and joints-True, but I assumed that carlsberg was having an MAF equipped engine from his comments that he did replace them <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /> Yep, the old L-Jetronic and systems  were so much more reliable. Even if the sensors all die, they could just still keep going on and on.</blockquote>