question about stalling

[BlackMark8Li]

my car seems to stall out at anytime when it feels like it, but only when your braking. like if I am comming to a stop light and I stop fast(not a panic stop) it sometimes stalls, and if I am turning a corner sometimes it stalls. my old engine did this so I know its not the new 1 I put in. is this a sign I need a new iac or tps?

 

[Grifter]

clean the iac.. it might be gummed up and not opening when it should..
try swapping in your old iac if you still have it..

 

[NYC LS8]

Yeah, sounds like the IAC.