Hello,

I've had this issue for a few months now, I thought it might be a mapping issue but my recent 165 upgrade hasn't fixed it. Basically my ST is quite rough on idle from cold (doesn't do it any other time). I'm thinking misfire, so potentially spark plugs/leads. I have Denso iridium plugs fitted around 2 months ago, so it could possibly be a dodgy plug?

I've upped a video, please ignore the knocking, as the engine is moving slightly the lid on my airbox is being hit slightly. So just listen to the engine itself.

http://www.youtube.com/watch?v=sRdJIvsDvQA