I dunno what's wrong!!!
Ok. I have an 03 6.0 with about 238000 miles on it. I just got this truck about a week ago. They guy before me said it had head gaskets around 110,000 miles and 3 injectors replaced. I test drive it with no lights on and motor runs pretty good. Well I got it home parked it and drove it to work the next day. As I was accelerating in 1st 2nd the motor would kinda misfire at lower to mid rpms. After 40 or so it would clear up. When the motor has been driven for about a few miles it clears up. Well the other day it did the misfire thing and cleared up but about a mile from home i kinda got on it alittle and the motor seemed like it lost 4 cyl and the truck would barely pull itself down the road. Well I got home(somehow) and parked it for a few hours. Went back out and cranked it it took about 5-10 seconds but it started and ran like nothing ever happened. Every once in awhile there are puddles of coolant on the ground but not every time I drive it. It's not blowing out the degas bottle and doesn't seem to be coming from egr valve. Oh. I was told to unplug egr valve so I tried it with no change. No programmers have been on this vehicle. Any help would be great. I just don't want to have to pull the cab for head gaskets and studs