IDLE/STALL Firebird problem

My problem is this... My 1991 firebird V6 Idles funny when I come to a stop and sometimes it stalls. Checked the TPS and the IAC they work fine. I checked hoses, they seem fine. Further more when I am just idling, and I stomp the break and I lift my foot it starts to Idle funny for about 7 seconds. I dont know if this is related, but it is very weird. I changed my computer. I changed my MAP (manifold absolute pressure) sensor. Also chnged fuel filter, spark plugs, cable to spark plugs. It seems that a lot of firebirds have this problem, I wonder if they have a notorious problem that someone would know. OH PLEASE ANYTHING, ANY HELP would be greatly appreciaed I have almost given up, I cant afford to take it in I would just rather live miserably than waste any more money. I took it in for this problem andall they did was clenmy injectors bla bla bla did not work. You guys are my last resort. There are no error codes, because if there were, the problem would be a little simpler, so we cant have that. Well thank you for your time.

hmm, i would suggest taking it to a shop, seems like you have taken all the steps, just ask them to have a look, and not to fix it. you can always do it yourself.

Yeah I think you are right. I might just do that today. Thanks.

Hi everyone,
I took my car in today and I was told it was the power booster $250. I think that has something to do with the master cylinder. My car does idle funny when I hit the break, could the power booster cause the car to idle funny and stall?