My pdm is from fsd cooler, is has a heat sink, and is mounted on top if the intake, (no i didn't put it there) and i was driving it through town at 30mph and the truck just died, no sputter no jerk just died, then i started it back up proceded down the road, and a quarter mile later it jerked so hard and missed that i about hit the windshield, so is this the pdm, thats what i'm assuming anyway, and if so is there any way to test them????

No way to test the PMD except by changing it to a new one.
Sounds like PMD on limp mode.

Fuel Filter is good, if it is, then there is a bigger chance of PMD failure.

That is assuming IP is good but usually IP problems preceeded by some codes not just sputtering and dieing without sign.

well the fuel filter is brand new, like two weeks old, but my lp hasen't been workin for quite some time and i just got a new one along with the filter, so i suppose the ip could have been over worked?? I did start it today and it idled fine and reved up fine so i don't know????