Engine stalls

No, don't go to the dealer yet. Let me try to help. What about when you go from Drive to reverse? Does it still die? What about when you go from Park to Reverse? Does it ONLY die when you put it in Drive? AND. Does it do it EVERY time>? A couple of things come to mind, considering that it's a Jeep. Not a bad thing, tho. I've put a lot of IAC solenoids on them. That's the little solenoid on the throttle body that controls the idle speed. It has a plunger in it that seats into a hole, or opening in the throttle body. The PCM tells it what to do based on various inputs, such as 'gear selection' on automatic tranny's. If that plunger becomes 'caked' with carbon/soot, then not enough air can get past it to allow the engine to run. It may have a LOW idle speed even in park or may even stall in park or neutral. Usually, removing it and cleaning it will fix it. ALSO, there could be something going 'haywire' in the transmission telling the torque converter to lock up when it's put in drive. This is more of a major problem, tho. I would really like to rule out the IAC solenoid first. When it dies, does it feel like you just 'dumped' the clutch on a 'standard' transmission when you put it in drive? Does the jeep lurch forward and die or does it just stop running? Get back with me with a few of those details and we'll figure it out.

Probably not. If it was the ignition system (i.E. Plugs and wires, etc.) Or the injectors, it would most likely miss under a load on 1 or 2 cylinders only but probably wouldn't kill the motor. I'm still leaning towards the IAC solenoid. Even more so after the new details. And good job, by the way on getting more specific. If it resembles a 'straining' engine, it could be caused by the IAC solenoid not allowing enough air in to keep the engine running. 750 rpms is correct, not 1500. The PCM tries to keep it at 750 rpms no matter what's happening as long as the throttle is closed. It does this by retracting or protruding the plunger on the solenoid to restrict air or allow more air in. When you're turning the steering wheel, that puts more load on the engine, therefore, the PCM will pull the plunger back some to allow more air in to raise the RPM's slightly to maintain the desired idle speed. Or when the A/C compressor kicks in. Same thing. If there is a lot of build-up on the end of the plunger, the PCM doesn't have any way of knowing it, and it has a preset value stored so it will know where to stop the plunger. These values are called 'steps'. So, to try to sum it up, when the A/C is on, the PCM knows that it needs to adjust the IAC to 'X' number of steps to maintain the correct idle. So it does. However, the buildup on the plunger restricts the air flowing past, so the engine is starving for air. When you put it in gear, the very same principle is utilized. The transmission puts WAY more load on the engine than the A/C or power steering, so the lack of air is magnified several times more, and the motor stalls. I would suggest removing the IAC, and using some strong B-12 Chemtool or equivelent, clean the plunger AND! It's seat inside the throttle body. It only takes 2 'torx' headed screws to remove it from the throttle body. It's really pretty simple. Occasionally, the solenoid has to be replaced but try cleaning it first. Let me know how it turns out.