Check out the Thermowax unit, been known to stick and cause idling issues.
I know you've swapped things around but I had exactly this problem just after Christmas. New set of plugs (old ones only 3 months old) but no better. Changed coil sticks on 1 and 4 and problem solved. Don't know how good they are but you can get them on eBay for about 60 gbp but I got genuine ones from the dealer for around 100 quid each.
Quote from: celticbiker on 28 February 2018, 07:15:51 pmI know you've swapped things around but I had exactly this problem just after Christmas. New set of plugs (old ones only 3 months old) but no better. Changed coil sticks on 1 and 4 and problem solved. Don't know how good they are but you can get them on eBay for about 60 gbp but I got genuine ones from the dealer for around 100 quid each.Did it not throw up a fault code???