Hi I have a 1999 +8 3.9 with a John Eales mod. I had running problems when I first bought it and had a new stepper motor fitted which cost £130. It was running pretty rough up till then. HOWEVER I then found out on a TVR site that they can be cleaned. I have done mine myself since as it seemed to need it, probably through lack of use. Cleaning costs nothing so give it a go. thumbs