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Message: <blockquote data-quote="aoch88" data-source="post: 31598" data-attributes="member: 8491"><p>Hey guys, my turn to ask for help <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" />My car is a 2007 530i N53 engine and here is what happens:- If I leave my car parked for a few hours (i.e. morning cold start, after work trying to start the car), the engine will vibrate badly when I start it.- I observe that the rpm was alright in the beginning (around 900-1000 rpm) but after 10 secs or so, it drops to 500-600 and this caused the engine to jerk/vibrate.- If I drive for 3-4 mins and when the engine is warm, the car works PERFECTLY fine. I am puzzled as to why it is vibrating only during cold starts?- I have changed the MAF sensor, air filter, High Pressure Fuel Pump, engine oil/filter (since my service is due) but did not help to resolve the issue.I have not had this problem before until few weeks ago. I plugged into the OBD and there are no errors related to this at all. My guess is that the intake might have issues? Not enough air going in during cold starts or something on the throttle body? Please help!Anyone know any workshops in Klang Valley that is well versed with N53 engines? I believe this is specific to N53 because the normal mechanic that I visit have no idea WTF is happening. It seems that this is not common among N52's.Tolonggggg!!! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" /></p></blockquote><p></p>

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