All,
  87 Vanagon GL, 2.1, Auto.  Water pump gave up the ghost-fixed that,
starter issues-finally got a good one, now the beastie won't idle to save
it's life.  If I disconnect Temp 2 it idles at 1800 rpm (smooth as silk) no
matter what else (even the air screw in the throttle body completely
closed).  New Temp 2 sensor-no change.  O2 sensor, no change connected or
not.  Starts smooth but within minutes, runs really rough, misfires,
running *super* rich (black smoke).  Any thoughts or suggestions?