I Have 2002 ford ranger edge 3.0 with 220k miles. When I accelerate at Lowes rpms the truck just jerks and bucks and barely moves. I have to literally floor it for it pickup and even then it barely goes. When I finally get it up to about 50 mph it give it half throttle or so it bucks and jerks. Especially going up a hill it will jerk 1000 times until I'm over the hill. Have no idea what causes this. There are no codes and only thing I can find odd is my intake air box has some odd humming sound with a pop to it. Like someone is popping popcorn under it very fast. I should say I let the truck sit for about a month without starting it before this happened.