Check the fuel pressure if its within specs -start here

If this is a turbo also check the charge air pipe hose especially near the turbo cooler. The hose splits open and will cause it to stall out. Also look at the rubber hose where the charge pipe connects to at the turbo itself. Have seen them split open there and cause your problem you have. Another place to look at is the fresh air hose connecting at the throttle. If anyone has worked around that area I have seen people not install it right since it is very hard plastic and pop right out. If that is the case then get a heat gun and heat around the pipe opening to make it soft. Then you can install it properly back on the throttle. Let us know what you find.