Last night my oil light came on (Not Bright like an alert) but sort of
dim.

1. Several weeks ago I had the oil sending unit replaced.

2. Oil in crankcase is full

The only thing I did yesterday was to clean the Idle Speed Control Valve
to see if I could get the idle under control. The little valve inside
the unit moves freely. I sprayed the valve with electrical cleaner first
and then sprayed it with WD 40 for lubrication.

The idle is now worse than ever, idling about 2800rpm.

Whether the two problems are related, I don't know.

Any suggestions would be appreciated

Lee...
86 Vanagon GL