i started getting this problem. Like Ill turn on the '90 ford ranger it'll idle ok. but when I put it in drive or rev. and go about 10- 20 feet and it studders then dies but when i put it to neutral or park it'll do the same thing but it takes awhile to idle to normal. i just changed the spark plug and the wires, its timed pretty good and i just changed the fuel filter yesterday. it still does it, i have no idea whats going on. lately, i recently ran it out of fuel so maybe thats why i thought well maybe it suck up some junk an plugged the filter so i changed it. thank u guys for your time.