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Message: <blockquote data-quote="hofmeister" data-source="post: 22495" data-attributes="member: 19669"><p>Hi sifus...want to ask...my M54 E39 Jerk violently when idle juz now at traffic light. it happen suddenly out of the blue.when i accelerate or driving the car is smooth. but when i idle, it will shake/jerk violently.no error shown at all at the control panel.i have checked the engine oil/temparature, all are normal. also my engine mounting was changed few mths back. any idea what cud have caused it ?sorry i have searched this forum high n low but seems like there's a lot of possibility to my problems..crankshaft sensor/PCV hose etc. any advice guys ?</p></blockquote><p></p>