98 2.4 . Little help please. The symptoms... High idle speed, totally falls on it face when slightly over revving the motor while changing gears, instrument cluster appears to be shorted out. It had a complete electrical tune up..plugs , wires, cap and button. Coil tested good. Mass air sensor changed and checked, good. Thps checked, good . Idle air cleaned. Cat. Converter checked for pressure before and after, good. Any ideas??