Howdy folks-

I just bought a 95 honda civic dx sedan and after taking the car home- I found a problem with the cars airconditioner.

When the car is idling- everything is perfect.
When I press the A/C button- I hear a faint buzz
When I step on the gas- then let off (as the rpm's fall) - there is a horrible grinding/buzzing noise. It doesn't happen as the rpm's rise.
When I turn off the AC- everything sounds perfect.

It only happens when the ac is on. Someone told me it could be the compresser of the ac or it could be the clutch to the ac?

What do you think it is? Can I fix this myself- what would the parts cost to replace- and lastly- where on the internet do you buy honda parts for your civic.

thanks

brian