1989 w. the 4.0L Automatic. It only does this while the engine is cold. Turns on fine. idles fine. Give it gas its fine. But this is where it almost stalls out every time. Give it gas, it revs up. Left off gas and give it gas again, it almost stalls out every time, but then revs up before it dies. Only will do this a couple of times, only while it is cold. I just replaced the EGR thinking that it could be the issue. I had the vacuum line unplugged because if it was plugged into it, it would stall out if you were not giving it any gas no matter the speed. So had to replace that for safety + emissions and was hoping that it would fix the cold almost stalling out issue it has atm but it did not.