I have a 92 F150 4.9L. has about 179000 miles on her and it will every so often stall when going into drive. The trans shifts fine all the time and but the engine does have a slightly rough idle. Like i said before though this has only happened 2 times in the last month or 2 but i would like to get it fixed before it becomes a more permanant thing. It did have 3/4 tank of gas as well and the fuel and air filters have been replace within the last month

 

I'd start by checking fuel pressure:



Then read this & its caption:



What transmission does it have? If you don't know the model, read this caption:

 

The first time the stall happened was about 2 months ago and the fuel pressure was checked when the filters were changed because it was shuttering and bing very unresponsive like the engine was starving for air or gas. The trans code was E so either BW T-87 3sp (early), or E4OD/4R100 auto (gas). I have not learned anything at all about transmissions yet so i know next to nothing about them.

 

So what's the fuel pressure NOW, while the problem is present? If you click the links in that caption, you'll learn about the transmissions.