So i bought a fuel pressure gage.. hooked it up, turned ignition on. Jumps to 60 for sec, then drops and holds at 55. Start the van.. holds at 55 still. Casual Driving around its at 55-60. Even when it starts starts to act up it still holds at the same ranges even while driving.. now what??

That definitely narrows it down. So, after re-reading your previous symptoms. I'm leaning more towards it being your poppet injectors. More than likely they are factory and have never been upgraded,.

They are not all that hard to replace.

$214 on Rockauto. These things are the common problem to the V6, V8 Vortec running issues.

This is the upgraded version..


And this is the older style...