I'm running the MPI basic kit for LLY non wasted s400 over the stocker... I had a exhaust/boost leak on the hot pipe and the stock turbo exhaust manifold and finial got it fix yesterday and took it to the track. Ran my tow tune first and had good bottom end take off and was looking good. truck seemed to fall on it's face around 4th or 5th gear...My guess is drop in rail pressure I ran a 13.7. so I switched over to my race tune on dsp and headed back to the staging lanes. Got staged and took off.. truck fell on it's face from bottom all the way to the top. I'm not sure what over all boost was but my big charger was only putting out maybe 5psi or a lill higher but not much higher. I ran a 15.08. engine threw a P0238 code along with a mass air code. The trucks sill not running right and the turbos don't sound like they did before. I think I'm basicly running on the stocker, I'm not sure... I did log three runs but I'm not sure I used the right pids.. On the third run I wasn't that hard on it and ran it in two wheel with slight boosted launch and ran a 14 something but I did log that run with the duramax imperial pids. Any ideas or has this happened to anyone else... I'm just lost, confused and about ready to take everything off my truck and sale it... this is getting old... i was running faster with stock parts and my wallet was a lot healthier.
