Measuring vehicle signals at the onset of a fault with the aid of diagnostic equipment is a common way of quickly determining whether a problem exists in a component. However, if there is no fault code for the fault, nor can it be reproduced in the workshop, how do we start to diagnose it? A 16 year old Touareg has been experiencing weak acceleration, and has been in multiple service...

汽修是一門嚴謹、細緻的學問，需要技術經驗的積累，也需要對車輛知識的深入掌握。 一輛2016大眾速騰款冷車啟動自動熄火，有趣的是故障只在低氣溫時出現，夏天並不會發生。按照經驗，也許換個火花塞、換個機油、…