Engine is idling rough, especially with AC.

[Xist]

Originally Posted by 2000mc

So the check engine light is caused by the ac cycling?

I honestly do not know, once we turned it off, it did not come back.

One shop said that I had a bad AC compressor and another said that I may, but the expansion valve was bad, and I needed to replace everything together. The lowest estimate that I can find is over a thousand, but the mechanic today told me that I can do it myself, eventually.

[nemo]

Hanynes has or had an Automotive Heating & Air Conditioning Techbook. It might be of some help. Covered maintance, troubleshooting and repair.

[2000mc]

How does the ac perform otherwise? Techs give you any specific info?

[Xist]

I almost never use my air conditioning, even though I drive a black car in Arizona and have a professional job.

I just rarely have passengers.

My air conditioning works pretty well, although there are some sounds that apparently come from the bad expansion valve.