Hoping someone can offer some guidance here. 94 6.5 3500. A month ago I thought I had filled my truck with bad fuel because it started jerking and bucking under load, I immediately put some sea foam in on the side of the road but it persisted occasionally for next week or so. I replaced ops, filter and lift pump. Pressure was 2 psi and now is around 5 or 6. Thought I had it fixed but yesterday it was running so bad on freeway I could barely maintain 50mph. I pulled off and it got progressively worse until the accelerator had no effect on rpm and truck stalled in intersection. Had it towed( from an hour away from home ). Hoping someone has any inkling what could be going on. Btw, I have remote mount pmd already. Tank filter? Injection pump screen?