Connections for your temp 2 sensor may be faulty. Guessing.
On Feb 4, 2014 2:06 PM, "TJ Hemrick" <x53gunner@gmail.com> wrote:

> 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?
>