Checked this out for a misfire garage had already tried new coil pack,moved the plugs and checked the compression, reading with VCDS it showed 3 faults that returned after clearing.
16684= Random/multiple cylinder misfire detected
16687= Cylinder 3 misfire detected
17414= Torque difference cylinder3 value exceeded

It looked like a possible injector failure on No3.
Stripped down and fitted a new injector. Rebuilt, started up and left it ticking over having a cuppa tea.. all sweet. After 10min engine starts to misfire, now i have misfire problems on cyl 2&4 16686/16688. What is going on ?. Any advice on this engine please.

Steve.