Car dies after deceleration

Please bare with me. My car a 94 formula firebird was dying after decelrations, basically after slowing down for lights or in parking lots and so on. The dealer said it was the EGR sensor and solenoid valve(vacuum). So I replaced it myself and for about a week and a half it was beautiful(execpt for having a trouble starting, it would turn over for a litlle bit then start). Now my car is doing the same thing, it dies at red lights, in parking lots and basically anytime I slowdown. It does this when ever it likes not everytime. I dont have money to be changing parts and guessing. I have no check engine light on. I have some knowledge of cars and I guess it could be the IAC(idle air control), the TPS(throttle position sensor), or even my fuel pressure and pump. My pump is new from about 7 months ago. Any guidance or hhelp would be greatly appreciated.