i got the valves tightened on the 320i and now the car won't rev over 3,800. It had low compression before this is why i got the valves tightened but then we lost rev limit. My import guide thinks its the fuel dis. I am afraid to ask for a new one so we will try another one first. Let me know if you can help out with the project. Thanks taylor f1hotstepper@hotmail.com