Bit of a strange intermitent 1 this, last week I noticed the speedo going nuts then it stopped working all together on way to work, took it back out at lunch time and the speedo was working but it had developed an evil missfire / stutter at approx 2200rpm in 3rd gear under load but would rev cleanly in neutral parked up. Drove home the same day and it ran fine!! Well this weekend the missfire was back and then followed by speedo not working, speedo working now but still struggling to rev past 2200rpm. Pressume these 2 issues are related? any ideas chaps? have done vcds and ony got needlelift sensor fault which i've had for a year so not related. I did take the lid of ecu box 2 weeks ago to change wiper linkage so wondering if something has been disturbed?