In Reply to: vacumm leak posted by MKM3 on October 04, 2000 at 23:11:18:
Purely speaking as an owner of older cars, 1980 TR7 Spyder, 1975 244 Volvo, and a 1990 M3, if you are in doubt about your vaccum lines on your M3 then change them. Assuming, your car has never had the vaccum lines changed and is at least 10 years old. Change them out. Vaccum lines are very simple mechanical devices, but control vital engine functions. Sure they maybe a pain in the ass to change, but if you change them you can be assured that any time your car hesitates you will know it is not your vaccum system.
Of course you can do the cheap skate test and spray carburetter cleaner around the vacuum lines. If your car hesitates, then you know you have a leak. Please be careful. You could start a fire.
Do this in an well ventilated area and have a fire extingusher handy too.