Hi all! Just discovered this forum on my hunt for diagnostics info. I've had my 2005 Corolla CE 5spd for about 3 years now, never lets me down. Over the years the idle's gone rough, almost stalls out sometimes.. It was throwing lean condition codes so I just replaced my manifold gasket and the idle got even rougher. Is there a way to adjust it even with throttle being electronically controlled? Or would I need a tuner for the ECM?