Hey guys. I've got a 03 Silverado 1500hd with the 6.0 and 4L80e. It has a single turbo on3 kit on it. Its got a 2 bar Speed Density OS. I've gotten the tune pretty happy in Open Loop. When enable closed loop again, the truck goes lean in boost under moderate throttle. This doesn't happen in open loop only. I've got Boost Enrichment set at 90kpa and its suppose to force the ecu into Open loop anytime it sees boost. Any ideas of what I can adjust? I'm convinced its either staying in closed loop to long or something in the closed loop options is effecting it in open loop. STFT's are disabled in open loop.
Attached is my tune. It is currently Open Loop only with STFT's disabled. I've disabled the closed loop by changing the closed loop enable settings to 281 degrees to enable closed loop.As found 5-2-20.hpt