Yep, it was my spin on filter. I changed it last night and today I was running on the freeway ahead of the packs. I have never experienced a clogged filter in a diesel before and I have over 150K miles in driving experience in diesels alone. I admit that I've only had about 30K miles driving a MB diesel and only less than a 1k miles running WVO. It's definately a learning curve to go through. I'm embarassed and I'll admit it. I do realize that my WVO is a little thicker than diesel but I didn't think it would have made such a big difference. Now I know.
I'm ready to have my crow now.
I didn't add any extra filters to my system but now I'm planning on adding one on the WVO tank. Any suggestions? I'd like a cleanable one like I remember having on a gasser many years ago. I wish I still had it. I was one of those glass type that when you unscrewed the ends the element could be removed and washed out.
Legal Eagle, Yes my tank is vented. I made sure of that when my first symptoms started.