Runs good, sputters then shuts off. IDM issue?

[cabloom7.3]

My truck (2000 7.3) started weird the last 2 times a ran it. I took it to the store and it started cutting out real bad and shut off. I started it back and it was cutting out real bad and i limped it to a parking spot. I ran the codes and got codes reading that all 4 even injectors werent firing right, eventually everything cleared up then it would cut out again and stumble and the IDM code would show up again. We tried a new IDM and it started out stumbling the same as the old one then it cleared up. Everything was good, no codes then all the sudden i would wiggle the IDM and it would start cutting out/bucking again. SOmetimes it would do it on its own sometimes it wouldnt. The plug on the main harness looks in good shape though. Could it be a ground issue? Anyone had this experience before? Thanks for the input.