I replaced my coolant temperature sensor and my hard starting has got a bit better. As soon as I did this my AIC was acting weird. A noticeable "vacuum sound" it never had before on start up and for quite a while. When it was noisy vacuum moved from 15-19 lbs, idle fluctuated too.

i thought it was to the place where I could live with it and on a hot restart the AIC went crazy and started hunting , up/down, vacuum was all over the place. Do AIC screw up like this or is it something else?

I really am starting to hate on this motor.