So when im driving my truck right when i start it feels like its going to stall, it idles really low. But i can rev through it. It goes away after a block or two but it doesnt rev very high. It did this a couple times before when i didnt drive it for a few days but today it did it after driving for alittle. What do you guys think is the problem?

 

do a tune up, sparl plugs, plug wires, cap and rotor, use dielectric grease and look for any signs of abnormal wear on those plugs, also change the fuel filter. and check your throttle body to make sure theres no unwated crap in there, like oil.