Reply to thread

Click here to become an Official Member of BMW Club Malaysia Download Form

Message: <blockquote data-quote="kw930" data-source="post: 731177" data-attributes="member: 40337">Has been driving my 320i (M54B22) for the past 1 year, so far quite some services had done to keep maintaining the car performance as per original as possible. Overall the car has been improved a lot as compare to a year ago, but still 1 issue that's quite frustrating and may need to seek the advice from sifu here.The problem I'm facing is the car having unstable engine performance, which during morning start up and after the first few minutes of driving, engine normally very responsive, pickup normal and the engine revving sound very solid. However, after a while, especially after stopping at junction or traffic light then re-pick up again, you may hear very loud roaring sound from engine and the car pick up slow. May need to step the pedal to rev higher, keep on driving some distance then the power may resume and engine revving sound back to normal. Observe the problem also happen when driving for some distance during hot whether, engine may suddenly roar out load and lack of power.Base on last scanning result (using scanner 1.4), no any significant error found.What had service and changed so far are :1) Double vanos o-ring & seal2) All new spark plugs and ignition coils3) Gear box oil changed4) Hardened vacuum hoses inside throttle body changed5) New fuel pump & filter6) New oxygen sensors7) Adjuster unit (DISA)Wonder would this unstable engine performance related to mechanical, electrical (sensors?)or pneumatic (vacuum?)?Besides, also suffering high fuel consumption all this while (around 13.5l/100km), not sure related to this issue too?</blockquote>

Verification