Motor power surge while driving
Hey guys, I have a 99 f250 with about 187,000 miles on it. I haven't had this truck very long but recently, it started to surge when I'm accelerating. Usually happens if I'm taking off at a slow start. I can keep the pedal in the same spot and it will surge foreward and the rpm's will jump anywhere from 50-250 then fall back down to normal...it will keep doing this until I step into it or get up over 60. It seems seems to be more noticible at speeds up to 60 and before it hits o.d. Other than that, it runs fine, idles fine, and if I get on it from a stop it doesn't miss a beat. Only happens when I'm taking it easy on it...maybe it just wants to run! I changed the fuel filter yesterday thinking that may be it but its not. Any ideas would be great. Was pretty efficient on working on my duramax till it burnt down but this is my first ford!