This could be coincidence, but I'll give the whole story:
-2000 ram 1500 4x4 5.2L, 210k mi
-new 5" BDS lift,
-35" MTs
-Put a can of seafoam through it

-Drove home today and it started shuddering, and threw a misfire code.

- Changed plugs and wires, started right up.

-Starts and idles fine, but under any load will rev up and then die. (put it in D, R, etc - or even rev it up)

-Searching has revealed possible crank position sensor, or dirty TB

Thought I'd get some input first before I spend any more money

 

it could be the crank sensor. it located on the right hand side on top of the bell housing. or it is on mine anyway. kind of a pinta to get to. i would also try cleaning the TB and all that. check your crank sensor quick though because if its cracked and it breaks off your totally screwed so i hope you have a AAA card.

 

Check your cat too. It can idle fine and be ok at lower RPM and any high RPM and it will kill it or cause it to run like ****.

 

I agree with the cat idea. Had a ram do the same thing to me more than once.