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Articles for: ECU tuning

Why 11.5 AFR Kills EJ257s: The Intake Temperature Factor

That Stage 2 tune with 'conservative' 11.5 AFR targets? It's murdering EJ257s across the country because tuners ignore intake temperature compensation. Here's why your safe ratio becomes lean death when IATs climb.

WRX Knock Events After ECU Tunes: Real Data vs False Positives

That post-tune knock you're seeing might not be knock at all — most low-RPM events are just injector noise triggering oversensitive ECU parameters. Here's how to separate real knock from false positives using actual sensor data.