I have had my ap2 for about 3 months (56k miles) and noticed somethings i found unusual. First thing is that at times when I shift into neutral to stop, the car hesitates as if the car is about to stall but doesnt. The idle drops a little bit, then goes back to normal.

Then yesterday, I (cold)started it up and the car started up strong and then the rpms dropped as if it was about to stall, then it went right back up and ran fine.

What do you think?

 

Both these things have happened to me. I found it was the gas i was using, believe it or not but in your case it could be dirty injectors, vacuum lines or even fouled plugs. Run a bottle of Seafoam through a full tank of gas.

Use only good quality gasoline, i prefer Shell but Mobil works well too. I noticed if i used no name brand 93 gas or HESS gas my idle was all sorts of rough.

I would also check the plugs and change them out if the car has never had it done before. I bought my car with 61K and i changed the plugs..big difference.