Hey guys, I have a 2018 RAM 3500 (Aisin) DRW with 150k miles.

It is DRD tuned with a 5" turbo back exhaust; the FASS lift pump changed filters 3k miles ago.

Everything else is in stock.

I was driving the other day at a red light when it started idling rough and shaking and loping or missing.

I didn't notice any smoke but didn't get out to look.

I turned around to return home, and about 5 min later, at a red light, it died and never started back.

I had it towed to my house, and it isn't throwing any codes on the MM3.

I changed the crankcase position sensor, but it still won't start.

I have no idea where or what to check.

No codes to go off of, and it won't start.

Before this happened it has been running fine.

The only issue I've been having is the service electronic braking system coming on and off while driving.

It comes up, then goes away, and does it repeatedly while driving.

Any help or advice would be much appreciated.