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Message: <blockquote data-quote="yohannes" data-source="post: 713433" data-attributes="member: 24653">Hi guys, It's been awhile since my last post and apologies for the long absence! I've been enjoying my UDM for some time now, until recently when a strange problem has manifested. My ride is a 318i runnign on the 4 pot N42B20. I have previously posted a question regarding the car sounding like a garbage truck on cold start, but that has ceased to bother me since it seems like a normal characteristic of this engine. However, what has been bothering me is that recently, when i re-start the car after it has been warmed up or driven, I sometimes ( but more and more frequently ) get a terrible rattling sound from the engine before it starts to judder and die off. On second start, it will start up perfectly. It is always the same. First start - clitter clatter sputter and die. Second start - Perfect. The car is therefore driveable, but this bothers me and I do hope to get to the bottom of it. To help , I have recently sent my car in to my friends workshop and the only 2 erros i got were O2 Sensor and camshaft sensor. The camshaft sensor has since been replaced, and the problem seemed to go off for a few days. It's back now though. Any advice and experience with this issue will be greatly appreciated! Thanks guys!</blockquote>