few more questions... even if your a\c is not on, is the compressor still consuming power??? i am guessing it is because the low idling feels like power is being drained from something... and with this compressor now plugged in i guess that is where its being drained... one thing i noticed is that everytime i turn on the car it has that low idle... when i turn on the a\c its cooold and it stays cold... then when i turn it off while iam driving the idle still stays low , few minutes later it idle back to 850 and vaccum is at 20 in hg once again... when i try turning on the a\c again it just blow the air from outside, with idle at perfect 850 ... its very erratic but there is a trend... any other suggestions?