I get alarm on the overhead service required, see dealer now with no codes, is in limp mode can drive about 2 miles then stalls.

I read on several other forums, try this try that, stick out your tongue lift your left foot, nothing seems to work and no one ever says what did work if anything, I am at a lose and truck has been down for several months, I need some help.

'08 Ram 2500 6.7, lost some parts 6 years ago breathes better, has Raceme jun (basic) the turbo went 2 years ago replaced with the BD screamer, about 8 months ago the head cracked at the water jacket replaced with a Jasper head with upgraded studs, ran great for about a month now, get limp and stall like it is trying to Regen but can't and the tuner won't tell not to.

The local shops don't have a clue.

Any help would be highly appreciated.

If I am in the wrong place to post feel free to tell me.