I recently installed a turbo back exhaust and EFI DSP 5 tune. About half way into my normal 32 mile commute my truck begins to smoke and looses power. After about 30 seconds it clears up and begins to run normal. No codes are being thrown. It seems like the DPF is trying to regen causing excess fuel to be in the system. Anyone else have this issue?

Had something just like that after I did DPF delete a few years back. Ended up blocking the EGR and tuning it out. I suggest cleaning the EGR if not ready to install an EGR blocker plate.

Brian

This issue develpoed almost immediately after installing the new program. I have the EGR system turned off but not blocked. I'll try blocking it to see if it helps.

Thanks, it was the EGR . Wow, what a difference.