1996 nissan altima engine stalls when going uphill

If you recently replaced the battery, you may need to reset the idle air control valve setting. This is done by removing the NEGATIVE battery wire from the battery while the vehicle is HOT. Then you must wait several hours for the vehicle engine to become cold. Next, once could, reconnect the negative cable. Start the vehicle, place your foot on the brake and imediately put the vehicle in drive. Stay in that situation until the vehicle engine bcomes hot to normal temperature range. This will be known by hearing the radiator cooling fan turning on. You must NOT use the airconditioner during this cause it will be on during the event. Once accomlplished place in park and allow the engine to cool, engine off. This resets the engine computer to tell the idle/load speed control valve to add air and resuling in additional fuel to the engine under various torque loads.