A 1211 is a bad IPR or a bad HPOP. With a good IPR, the truck would run until hot then die. With a bad IPR it will not start at all. If you so decide to replace the HPOP, I will ship you my core to avoid the core costs (IPR or HPOP). This way you can have your pump and theirs too.

I think the dieselsite has the cheapest HPOP at 469. Ebay IPRs go much cheaper.

My truck would die at stop lights, then not restart until the ICP was disconnected. Then it dies all together only to run when cold. When I resealed the IPR, it died completely. I put in a new IPR and it got back to running when cold. The HPOP fixed my issues. Runs great now.

Aaron