900rpm, and 600 rpms, respectively.
idle should be aroung 900 iin park then when in gear should idle around 650 or 700
if an auto trans-in gear 550 <-it should speed up when you put it in park that should be 650---start with 550 in park--put into gear-if it wants stall turn it up 2942E6B7-0D26-E667-F7DC-E162A40E3ADF 1.03.01
A vacuum leak (Brake booster).
A vacuum leak can do that. Check the gasket at the base of the throttle body for a vacuum leak.
Park on a transmission is a gear that allows the transmission to idle as if its in neutral while locking the drive train to prevent the vehicle from rolling.
About 700 in Park dropping to 500 in gear with AC running.
In park, the transmission is in neutral: very little "load" on the engine. In drive, the engine is loaded somewhat by being in gear. Therefore, any engine performance issues will be exaggerated. Of coarse, engine performance issues could mean just about anything!
take apart the dash, and reset it to park when the car is in park.
footbrake deactivation switch
Vacuum leak; there is a slight load on the engine when stopped at a light because you are in gear, there is none when in park.
No, you may have to check your idle. You can change the idle so when you put it into gear it will not die. You must make sure that the engine is warm when you adjust the idle or it may make it hard to start when the engine is cold. When it idles in park or neutral it should sound a little higher than when it it idles in gear or drive or reverse.
Could be a very dirty fuel filter.