1995 integra idling problem

i have a 1995 acura integra LS 4dr. with 255000 miles and a week ago the water pump blew and then i had to replace it and i also replaced the belts. then when the mechanic tried to start it it started perfectly but then when he would take the foot of the gas the engine would die. i was thinking it would be the Idle Air Control Valve. Or if it is not that what is another reason it does not work? what do you think? thank you

it sounds like one of 3 are bad. 1. map sensor.2.egr valve.3. throttle position sensor.