often (not always) after 200 hignway miles my 2.1 L '87 Vanagon GL
     starts bogging @ 4000 rpm, but only under acceleration/load.

     when its in a "session"  the idle is erratic/high (2000 rpm)/or non
     existant (stalls).

     any ideas?

     get this:  my local VW dealer (Curran VW/stratford ct)  said their
     $60.oo diagnostic includes only a visual inspection of the engine
     compartment! (as if, in the rare occasion I let someone else work on
     my bus, I'm not already going to have done the basics)  and, according
     to them, there is no computer diagnostic test possible b/c all the VW
     service dept's have gotten rid of their vanagon specific equipment!
     this sounds a little odd to me.

     ...(shaking his head the service dept manager said "you vanagon guys
     are on your own"..)

     -curt