I have a 2000 ram 1500 4wd with 5.2 5speed when im driving down the road at high rpm's the truck will run fine say i shift from 3rd to 5th and kinda lug the motor the truck will start missing and cutting out BAD. I dont have a cat, i have changed plugs. wires. throttle position sensor, stator coil under the distributor. Also have 60psi at the fuel rail at idel. But like i said at higher rpms the truck will flat run. it has 35's and a locker in the rear and i can set it sideways on the road so hopefully its somthing small. Thanks for any input in advance.