I have just put one in mine. Seems to respond a little quicker, wont make a massive ammount of extra BHP. Although after fitting some new spark plugs and resetting the ECU i have noticed an increase in fuel efficency
yeah, sounds like interferance..
Had this on a range rover, called out RAC to recover, he drove 5 mins down the road, i pushed the botton it all opened, got him to drop the car off the van and away we went :D