Today the new (to me) ECU with Shoebox Monitor pigtail, arrived. Took,it to
the shop and the mechanic there installed it.  The new 7.5 fuse was in
place and the new 2003 TDI starter turned the engine easily. With the
replacement ECU in place, the engine fired right up. However, there were
two immediate problems.

The engine hunted up and down rapidly over a significat range of rpm. As
the engine warmed this tended to disappear.

The other problem was that the engine  idled way to high, about 1800 rpm.
Shut it down, pulled the O2 connector, and the ISV connector, and started
again. Engine idled nicely at 850 rpm!

What to do with this situation I don't know at this point. The ISV was
working just fine, Could hear it buzzing beautifully. Left the isv
unplugged but hooked up the O2 connection and 5he rpm jumped to 1400 rpm.
Don't know what to make of it.

Reseated the front wheel bearings and retorqued the spindle lock nuts and
peened them down. Greased the C/V'S.

MONDAY I pick up my magic carpet!!!

Comments and opinions appreciated.

John