My '94 MX-3 has been having issues ever since I bought it and they are getting worse. So, I have decided it is actually time to take care of them (hence joining the forum ). Most annoying out of all of them is this engine rev thing that it does. When coming to a stop, when I put in the clutch and brake (once the engine is warm), the tach revs from 1000-2000 RPMs. It does this until I let the clutch out slowly (foot on brake) to bring the RPMs down. I have been told a few different things, but most common is that it is a vacuum line. Does anyone have other insight into this, or know if it is a different problem? Or if it is in fact a vacuum line, how difficult is it to change?