1. Change the Main Fuel Relay

2. Check IACV or EACV whatever its called, unhook all hoses connected to it, its located under the throttle body. there should be 2 screws screwed into a flat panel, unscrew em and there should be a little "bullet" type plunger take a Flat Head Screw driver and turn it so its seated farther down. Reconnect and clear the air from the coolant line.

3. Was the engine an Auto or a Manual you might have to advance or retard the timing.