I need help here. I have a 1994 Expo Lrv with a 2.4L auto in it. 131,000 mi on it. It will sometimes stall when you roll to a stop or when you shift to drive or reverse from neutral or park regardless of temperature. It doesn't always do it. If I keep the throttle valve off the stop and bump it into neutral coming to a stop it will idle normally. It only does it in gear with the throttle closed. I have held the throttle slightly open thinking it might simply need an adjustment but it stalls off the stop as well. So I don't want to mess with the idle air or fixed idle adjustments. I have the factory manuals for these cars and have four of them. I need a tech here because I don't know what else to do. I've overhauled the transmission, replacing the torque converter and swapped out the entire valve body including the solenoids so the trans shouldn't be causing it. The coolant temp and vehicle speed sensors are okay. I've swapped out the map sensor with no change. I've swapped out the throttle body including the tps and iac with no change. I've blocked off the vacuum ports at the manifold so it's not a vacuum leak. I've swapped the fuel rail, injectors and regulator no change. I've swapped the fuel pump no change. Swapped engine and trans ecu's no change. Swapped the shifter position switch on the transmission no change. Swapped the distributor (cam and crank sensors, ignitor) and wires no change. I've swapped the egr and egr temp sensor and the car isn't showing any codes. Everything is stock and everything looks normal. The car runs fine until it stalls. Off idle it runs great going down the highway. No smoke or noises. My wife says it started doing it after she filled the gas tank. I've visually inspected the tank when I had the pump out and there's no contamination or water in it. I've run that tank out and have since filled it back but it's still doing it. I've followed the schematic and checked what I thought was everything it could be. I've even swapped out the iac motors by themselves just in case but it still stalled. Now I'm starting to repeat things I've already done. I may be missing something obvious but this thing is really kicking my butt. Thanks in advance for any help.

How is the idle in general? Have you cleaned out the throttle body? The back side of it (as well as ISC) is usually covered in a thick soot layer and that causes all sort of idle problems.

Yes, I've actually completely swapped the throttle body, tps and iac with another assembly. I've also cleaned the throttle body. I have since changed the fuel filter and fuel pump relay. Nothing helps. In neutral or park it idles normally. Off idle it runs normally. In gear and off throttle it will stall. I disconnected the solenoid harness from the transmission thinking that the torque converter may be locking up and it made no change.