engine light comes on over 50mph
For about 3wks now if I go over 50mph I get a small back fire and the ck engine light comes on and the truck starts to crawl to under 25 mph... I pull over and shut it off...restart and all is well...till I go over 50mph... I changed the fuel filter 2 nights ago but no change...I am at a loss.... I'm new at self repair and want to learn....please help

