(10-06-2012) Blondie repair

Blondie, my trusty old VW GTI, has been giving me some problems for the past month or so and today I think I finally figured it out.  Last weekend, I replaced the mass air flow sensor, but it didn't help.  The error code reported by the ECU was a P1136 - which says that the fuel mixture is too lean or some such thing.  I took all of the covers off the engine and spend a loooong time listening to the engine.  I could hear a vacuum leak somewhere, but for the longest time I couldn't find it.  Eventually I brushed the broken hose with my fingers enough to change the sound and I was able to find it.  The hose was located on the underneath side of the intake manifold - a real bear to find, see and replace.  I replaced the hose and gave it a test fire, and it does seem to idle much better, but only time will tell if this really fixes the occasional stalling that she's been suffering.