A few weeks ago my ED30 started to misfire a little in the mornings on the way to work and then the morning after a 150mile trip it started to misfire like crazy (with engine warning light flashing).
Yesterday I changed all 4 coil packs and its loads better and I've no loss it power when warm. However, I still have a noticeable misfire when the engine is cold.
Should I have changed the sparkplugs when changing the ignition coils?
If so should I stick with OEM plugs or go for something more fancy?
or
Should I just bite the bullet and take it to the dealers (they've quoted £65 minimum to find the problem).
My ED30 is 4.5 years old, totally standard with DSG box and its covered 47,000 miles.
Many Thanks in advance.