Hi scotty. Pls watch the attached video of the rpm gauge of my car honda city 2006 idsi, cvt. You can hear a noise that is like knocking noise. It always sounds like that whenever the car is jammed in traffic for a long time like 30mins to 1 hour. It doesn't sound like that on continous drive, normal drive and long driving.The rattling sound of the interior parts of the doors are a bit noisier. We already replaced the rear and right engine supports. The left engine support is fine according to a mechanic. Changing of sparklugs, change engine oil and change transmission oil is also done.