Truck Shudders/ Shakes when driving??!

[Jonzzer]

My ranger is a 94 2.3 and is having a major problem. When im driving it it develops a shaking shudder problem from somewhere in the engine. I pulled dtc 337 336 so i replaced the dpfe sensor to no avail. i cleared the codes by disconnecting the negative cable for awhile. The Cel came back and so did the shuddering. i tested the volts to the dpfe and got 5 so its good. Any ideas i need it figured out soon its my only car...Thanks

 

[Bryan22]

probably not a bad DPFE, but a bad EGR valve, clogged passages, bad egr vacuum solenoid, or bad vacuum lines... start testing.