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Message: <blockquote data-quote="Grand" data-source="post: 8751" data-attributes="member: 6501"><p>Dear all, My E39 year 99 seems to be running out of air when cruising. Say for instance, when I am cruising at a constant speed of about 110 - 120 kph, when i release the accelerator pedal while going down hill, the car seems to knock/choke a bit as if it is trying to catch some breath.  I have just serviced the car and change the air filter, fuel filter, oil filter, engine oil, spark plug etc.Prior to this, when doing a diagnosis, the message which apear is "faulty solenoid valve". Any forumner faced this problem before?Cheers<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite5" alt=":confused:" title="Confused    :confused:" loading="lazy" data-shortname=":confused:" /></p></blockquote><p></p>