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Hello- > I was able to check where the vacuum hose to the dizzy is connected and it is attached at > the plenum/intake air distributor on the underside close to where the air cleaner elbow > attaches. So it looks to me like its connected where the retard hose should go; however, > I don't know exactly where the Throttle Body is. A throttle body is basically a carburetor without the carburetor circuits - just the butterfly valve and the body around it. On the FI'ed T3, the throttle body is integral with the plenum (manuals give it the funky term of "intake air distributor"). I haven't messed with one in awhile, so the exact physical location of the nipple I cannot tell you, but I can tell you the exact logical location of it. The port for vacuum advance is located just updraft of the throttle plate (toward the back of the car) when the throttle plate is closed. As the throttle opens up, it will pass over the port. If you peek around, you should be able to see a nipple that looks like it goes to a port that goes in this location. The retard port goes either in the plenum or below the throttle plate. What's the difference? At idle, the vacuum advance port should see zero vacuum, whereas the retard port should see quite a bit. The fact that your vacuum advance changes idle timing by 10-15 degrees hints that you've got the wrong place... or that the throttle position at idle is WAY too high. Take care, Shad Laws LN Engineering - Aircooled Precision Performance http://www.LNengineering.com ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/