My car is running rich and I suspect I will be messing around with it soon. It's CIS-Basic on schrick 276 cams with euro fuel distributor. I have no vacuum leaks, my spark plugs do indicate that I'm running rich, my a/f tells me I'm running rich as well, my timing is set correctly (6*btdc). I know I'm gonna have to go through all the tests for CIS with a pressure gauge to see what the system pressure and control pressure is and all the other fun stuff. I'm trying to find shims and I look up on google for "fuel distributor valve kit" and it shows the shims, but I've found so many kits and most are for mercedes and bmw. Is there a specific bosch part # I have to look for VW application?