Well problem solved should have replaced the rattling stop rattling catalytic converter a long time ago. Sure woke the truck up from the dead, power galore on step inclines and no surging.

Looked inside the old cat and lthe honeycomb shrunk an inch or more and the entire honeycomb moves back and fourth. Sure if I sliced it open I could see the obstruction.

Now to see what the cat guy will pay for this old bestie.