userdinardon07
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. |
11/15/2024
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Analysis of this third gear pull continues to show the same concerning lean conditions as previous logs. With MHD Stage 2+ v1.09 on E20, the DME is struggling to maintain target lambda values under load despite stable boost control. Lambda values are consistently deviating lean from the ideal 0.82-0.85 target range, even with maximum fuel corrections being applied. Given this is the third consecutive log showing identical behavior, we can definitively rule out transient conditions or one-off events. The consistency of these lean conditions strongly points to a systematic fuel delivery limitation. Most likely culprit is fuel system hardware performance, particularly the LPFP and/or HPFP efficiency under increased Stage 2+ demands. The stability of boost control while running lean suggests adequate airflow but insufficient fuel delivery to match. |
11/15/2024
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Third gear pull analysis from 12:34:11 shows concerning lean conditions under load with MHD Stage 2+ v1.09 running E20 map. Despite full bolt-on configuration including Dinan CAI, BMS RACE IC, ER Chargepipe, AA Downpipe, and AWE Exhaust, fuel delivery is not matching airflow demands. While boost control remains stable, lambda values are deviating significantly from targets, trending lean throughout the power band. DME is attempting maximum correction but cannot achieve desired lambda targets of 0.82-0.85. This pattern strongly indicates fuel system limitations rather than mapping issues. Most concerning is the consistent lean condition across multiple pulls, suggesting either LPFP performance degradation, HPFP efficiency loss, or a combination of both. |
11/15/2024
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Target lambda values are not being maintained, with actual readings showing lean conditions especially in mid-range RPM. Boost control appears stable but fuel delivery isn't matching demand. DME corrections active but unable to fully compensate. Despite full bolt-on setup (Dinan CAI, BMS RACE IC, ER Chargepipe, AA Downpipe, AWE Exhaust), fuel delivery appears compromised. Actual lambda readings deviating from requested values by concerning margins, especially under load. This pattern suggests potential fuel delivery restrictions or pressure regulation issues.
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11/15/2024
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Multiple logs showing same pattern indicates systematic issue rather than isolated event. Actual AFRs trending consistently leaner than target values under load. Boost control appears stable but fuel delivery not matching airflow demands. Primary suspects: Low-pressure fuel pump performance, high-pressure fuel pump efficiency, or potential intake leaks affecting MAF readings. |
11/15/2024
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