This log continues to reinforce concerns from previous pulls. The most telling aspect is the consistent pattern of fuel correction attempts by the DME while unable to achieve target lambda. What's particularly interesting in this pull is the initial lambda response - it starts closer to target but drifts lean as load increases, suggesting the fuel system can initially meet demands but falls behind under sustained load. This behavior is classic for either: LPFP reaching flow capacity limits HPFP unable to maintain rail pressure under extended demand Possible heat-soak affecting fuel delivery efficiency Given your setup and these consistent logs, switching to 93 tune would be an excellent diagnostic step. The reduced fuel demand of 93 vs E20 should show immediately if we're hitting hardware limits or dealing with a different issue entirely. ⚠️ RECOMMENDATION: Flash to 93 map, perform similar logs, but watch initial spool behavior closely as it might reveal where exactly the fuel system starts to fall behind.