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Message: <blockquote data-quote="absidian" data-source="post: 211095" data-attributes="member: 4356">There are a few solenoid valves in the engine and autobox.Your solenoid valve fault would most likely be the vanos solenoid valve - you mentioned the engine was "choking" and "out of breath", both of which point to timing/fuelling issues.The VANOS solenoid valve controls the valve timing - when this goes wrong the engine will be out-of-sync and possibly (trying to) stall whilst moving, hence the "choking" and probably spluttering at transient. The "out of breath" symptom you described is caused by the engine not operating at maximum efficiency due to incorrect valve timing.I hope this is helpful. Could possibly be mistaken here, but this would be the most likely cause based what info there is available.</blockquote>