02 TL Type S Problem

ok here we go. This car is hard to start, but will do so always. Idle is better now since new IAC. However once acc is pressed, the engine will stall. Pinching off the fuel return will eliminate nearly every bit of the hesitation, but I have replaced the regulator and the fuel pump. Fuel pressure is solid at 49 lbs, exactly where it should be. After feathering the gas slowly I can get the car up in RPMs and once it passed 2500 or so, the engine smooths out and runs perfect. Plugs are also new(NGK Iriduim). I am baffled and stuck. Checked TPS and by AllData, all values are accurate and there are no vacuum leaks that I can detect. Any help will be appreciated, and please do not tell me to clean the MAF, because it doesn't have one. Thank you. (I have been told 20 times or so by people that it could be the MAF, I guess they know nothing about Honda's)

Is the idle is ok until Air-cond is on ?