Excuse me for pointing this out but "peddle" is something "peddlers" do
- like door to door salesmen. The thing you press to make the car go is a pedal. Your engine idle is controlled by an idle air control valve at the bottom of the throttle body. On one end is a bimetallic thermostatic coil and on the other end is an electromagnetic coil controlled by the ECM (engine computer). There is no lubrication for the cylinder in the IAC that moves to progressively reveal a larger opening for air flow at idle, so the valves can stick. Sounds like the computer is trying to tell your car how to idle, but the valve is responding erratically. Try this: Remove the clamp on the large air hose at the throttle body next time the idle is acting up. Spray some TriFlow into the rectangular opening right in front at the bottom of the throttle body. This is the air intake for the idle control valve. When the throttle is fully closed at idle, that valve lets measured amounts of air pass by to control idle speed. TriFlow contains Teflon and is usually available at bicycle stores, and possibly home improvement and motorcycle shops also. I discovered this after completely dismantling, cleaning and adjusting the throttle body, and replacing the IAC valve with new factory fresh, only to have the problem return. The Teflon fortified lubricant seems to have enough residual effectiveness to have resolved the problem now.