Hi guys,
Happy New Year to all.  And when I say guys, I mean the gals too.
For the new year, I have a puzzle to fix.  I am baffled.  A friend of mine asked me to help him fix his trouble.  I took it on, but I wish, I did not.  
It starts fine, idles well for awhile, then vacillates, hesitates, it dies while driving or while standing at the light, or whatever, until it warms up.  Once it warm, it is fine.
Now, I changed the temp II sensor, the Oxygen sensor, looked at the vacuum lines (although did not check vacuum with gauge), changed the idle unit that's on the top of the engine.

I have also hooked up, using it the first time, a Digitool.  I get all kind of readings that don't tell me anything, of course.  I don't even know if they are voltages or what.  For example, while I'm getting good reading from the O2 sensor at the sensor, it gives me from 1.2 - 2.2 reading.  About 1.00 more than I would expect.  Or the reading for the O2 sensor ground, which is just over 1.00, up to 1.35.  I guess, it should be 0.00.  But who knows.  
Anyway, is there one online who would know where to look for the fixing?
I would appreciate it.  Reading the archives did not help.
Zoltan