I've got a 205 with a 306 gti6 engine installed. I had problems with the idle being a bit high. I replaced this with a ECP 57 pound one. At this point I also carried out a ECU reset.
The idle seemed to have sorted itself until I took the car for a 'spirited drive'. When pulling up at junctions the revs fly up to 3k. I have to keep dipping the clutch to stop the car revving so much!
Now i've tried a new MAP, ICV and given the induction system a good clean with carb cleaner. Still the same. What does the Vehicle speed sensor do? would this have anything to do with a high idle after a motorway run?
Can anybody point in the right direction on getting this sorted as I loathe to take the car out for a thrash. Cheers in advance!