ok so my engine light has been turning on and off every once in a while, so i went to autozone and had them run a trouble code on it. turns out the 02 sensor after the catalytic converter is defective. so today i went got the new sensor and put it in. started the engine and no light. so to clear the code i unhooked my battery and hooked it back up. when i went to start its idle is down to like 250 rpms?!?!?!
it usually idles at 750-800. any ideas?!?!