tune -up

[dimasp]

Hi everyone !!!!, My 1995 850 had the A/C compresor damaged for some time, at last I changed and there is no more heat while I'm driving at least. My problem is that when I turn the A/C on the engine hesitates and show a big loss of power ( it doesn't show this when is off ), I supposed it needs a tune-up, the last one was at 170.000 miles ( at that time the A/C was already out ), when I changed the timing belt, right now it have 175.200 miles. Any opinions, THANKS !!