The orginal AC unit started making a whrring noise when engaded 1200 to 1400 rpm starts to make the sound increases
1. thinking it was the pulley bearing replaced the old Ac WITH A NEW UAC AC compressor.....whrring sound continues.
2. Replaced the Power steering pump, Alternator, tensioner and pulleys , and belt./....whring sound continued.
3. Found a front motor mount broken..replaced ...still have same issue
4. Back to the AC compessor.. actually but on another AC compressor..3rd one and the whrring noise continues when engaged.
If it was not for the original compressor that started manking the sound, I would thing the UAC AC compressors are just noisy.

all the sound appears to come from the compressor when using a scope to lesson.
I have run out of options. what could be casuing the whrring noise after elminating the above causes.