94 Tbird 3.8 almost stalls at red lights

after the car warms up when you stop at stop signs or red lights the car will act like it is missing cylinders, will not shut off just idle terribly! I have already tried replacing the IAC, Distributorless Coil Pack, Plugs, Wires, Cleaning the MAF, Replaced the O2 sensors. Any ideas or help would be greatly appreciated

Vacuum leak? If you rule that out then for shits and giggles run a compression check on all the cylinders. They should all be pretty close to the same (about 10% variation is the upper limit of acceptable).

thanks for the input, it was in fact a vacuum leak the small pipe from the pcv came loose under the intake. Not a fun item to get back in place! But it cured the problem
Thanks agiain for the response