E28 Vibration

[zank]

What could be the most likely causes of engine vibration while the car is in static? Beside the engine and gear box mounting, what else could be the problem? I felt some vibration during the low speed, which likely to be the long shaft issue like most people has been debated over the years. But also felt the vibration while the car in static, jerking/mild vibration feeling on the sterring wheel and seats. Checking the engine mounting and gearbox mounting, both looks new just replaced. Some said could be due to OEM/Germany engine mounting, should be replaced with BMW Original mounting, while other say should try to change the Plug Cable, appreciate sifus here can share here. thanks.

 

[Vincent Hor]

Spark plugs, air flow meter, ECU, Idle control valve, clog throttle body