So I read a lot of threads and but don't ever post, but now im left scratching my head. I have a 2007.5 ccsb that I have done a efi tuner and dsp5 switch, exhaust, down pipe, and had the egr removed and blocked and some time back the right rear up pipe split at the egr bellow and so I removed the up pipe and cut off the egr extension and welded it shut. so just this week I finished an install of a rebuilt lly turbo that was converted to a 10 vane turbine and a 68mm billet compressor wheel and housing. and installed a hsp y bridge and cold pipe over the alt and installed a hsp hot side pipe. and installed a lml left exhaust manifold. so it runs ok but not what I was expecting. the truck seem lagie and when towing it goes in to reduced power and the vane position defaults to 100% and makes no boost. I'm running in dsp position 4 according to the paper work that I got with the tuner its a 100hp tune. no codes set and you pull over and cycle the key and good to go for another 5 miles until it does it all over again. I'm wondering if it needs a custom tune for my set up I'm thinking it thinks its and over boost problem. any advise?
Help: mostly a reader with a tuning question
- Thread starter JimT103
- Start date
Tuner probly has p0299 shut off. Long and short is the max vane tables are limiting the boost below what the desired boost tables are requesting. Running lower boost then the desired for "x" amount of time will throw underboost and reduced power mode(limp).