as i am sitting at a stop sign or stop light in drive, foot on brake, i notice my rpms drop then go rite back up... i also hear a wierd clicking sound and it feels as if the car wants to move foward slightly... i also noticed it does it alot when i have my heater on and it only does it in drive if i put in park or neutral it doesnt do it. Any thoughts?? o and another thing is when i get on the accelerator just even a tad it sputters for bout a seconds then goes, could that be a fuel filter issue? i havent changed it for about 40000 miles =O

disconnect your a/c pump clutch wire and see if that helps. might be a bad pump. gf car has the same problem.