I have a stock 1997 F 150 super cap 4WD, 4.6 liter engine, 46,000 miles. Just recently it has started to stall when sitting at stop lites, signs etc. It runs fine when under throtal and idleing at start up and in park. It seems worse when the engine is at running tempature. Any ideas are welcomed.

 

It was the trottle position sensor on my '84 Tbird. You might want to check for intake leaks if you are having a rough idle problem also. Hope this helps.