Hi my 08 cummins. 112k fully deleted efi live. While under load. It surges almost like its starving for full. Rail pressure at full throttle is around 22k. The other day I noticed my boost was extremely slow to build. When this started the lightning bolt on dash started coming on ramdomly. It's chargeing around 14v. I have cleaned the terminals and such. I was almost thinking possible bad lift pump starving the injection pump. ? Plan on hooking up gauge this week. Forgot to mention this is the truck in my sig. And only code if throws is. P2580 which is a turbo Code. But it's not a stock turbo anymore and has ran like this for a long time