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Demo Report
This is a demo report showing a classic N54 HPFP failure pattern. The high-pressure fuel pump can't maintain pressure under load — the #1 failure mode on the N54 platform.
Feb 28, 2026, 4:12 PM
Scored for 2008 BMW 335i · HPFP Failure
Critical safety condition detected. Do not drive under load until investigated.
3rd
9.5s
3154-6800
11.7 psi
3rd
9.5s
3154-6800
11.1 psi
3rd
9.5s
3154-6800
11.7 psi
This log captured 3 sustained WOT pulls with significant load. The engine was pushed hard — scores above 60 indicate a demanding session.
This is the classic N54 death spiral — the HPFP fails, fuel pressure collapses, the mixture goes lean, knock sensors go off, and the DME pulls timing trying to save the engine. All three conditions are present in this log. The root cause is the fuel pump — fix that and the knock and lean conditions will resolve. Do not drive this car hard until the HPFP is replaced.
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3 pulls detected over 34sIntensity: Hard
This log captured 3 sustained WOT pulls with significant load. The engine was pushed hard — scores above 60 indicate a demanding session.
Estimated timelines based on observed trend rates
Projections based on observed trends. Confidence: low-medium. Actual degradation depends on driving conditions and maintenance.
Your findings match patterns associated with known engine issues
Your findings match the classic N54 high-pressure fuel pump failure pattern: fuel pressure collapse under load, lean lambda excursions, and knock retard spikes. The N54 HPFP is a known weak point that fails progressively. Left unchecked, the lean condition will cause piston damage.
Pattern matching is probabilistic, not diagnostic. Consult a qualified technician for confirmation.
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Generated by TBK Logs — tbk-logs.com
This report is generated from datalog analysis and is not a substitute for professional mechanical inspection.