Also make sure that you check for vacuum leaks. Mist the engine compartment with some WD40 around the vacuum lines and see if the RPM increases, if so you know you have a leak. The other thing to look for is the Throttle Position Sensor (it is located right next to the IAC in the throttle body). When it goes bad it will think the throttle plate is either to closed or to open.
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Also make sure that you check for vacuum leaks. Mist the engine compartment with some WD40 around the vacuum lines and see if the RPM increases, if so you know you have a leak. The other thing to look for is the Throttle Position Sensor (it is located right next to the IAC in the throttle body). When it goes bad it will think the throttle plate is either to closed or to open. Of course, a bad (or going bad) fuel pump can give you the same symptoms as well.
Also make sure that you check for vacuum leaks. Mist the engine compartment with some WD40 around the vacuum lines and see if the RPM increases, if so you know you have a leak. The other thing to look for is the Throttle Position Sensor (it is located right next to the IAC in the throttle body). When it goes bad it will think the throttle plate is either to closed or to open.