LogalyzerEarly Access

CRITICAL ISSUES DETECTED — 3 critical violations found. Review immediately before driving.
DS1 2.5L I5 TFSI
2-5-tfsi-2025-10-16_20.35.52_log.csv (Demo)
May 5, 2026 at 1:57 AM
Critical
3
Warnings
0

System Checks

✓
HPF Fuel Pressure
High pressure fuel system maintaining adequate pressure
✓
LPF Fuel Pressure
Low pressure fuel maintaining required differential (min 400 kPa, or boost + 200 kPa)
✓
Knock Detection
No significant knock detected across all cylinders
✓
Lambda/AFR
Air-fuel ratio within safe range under load
✗
Boost Control
Boost control issues detected
3 violations
✓
Charge Temperature
Charge air temperature below warning threshold
✓
Injector Duty Cycle
Injectors operating below maximum duty cycle
✓
LP Injector Duty Cycle
LP injector duty cycle below 95% limit

Issues Found

Boost Deviation - Critical

critical 3x

Boost pressure deviating >400 hPa from target.

Check for boost leaks

Verify WGDC tables are sensible

Verify wastegate actuators move freely

Check wastegate actuator length

Check exhaust for obstruction

Check turbo shaft play

Check intake filters

Consider intake upgrade

Consider turbo upgrade

Notes

Violation Detail

Boost Deviation - Critical (3)
Time Severity Message Details
130.90s critical Overboost - boost above target over 200 hPa Duration: 1.46s (74 entries)
Boost Actual: 1500 hPa
Boost Target: 0 hPa
150.34s critical Overboost - boost above target over 200 hPa Duration: 4.26s (214 entries)
Boost Actual: 1820 hPa
Boost Target: 0 hPa
181.70s critical Overboost - boost above target over 200 hPa Duration: 5.70s (286 entries)
Boost Actual: 1860 hPa
Boost Target: 0 hPa

Diagnostic Graphs

Pull #1 Analysis

Analysis of pull from 130.56s to 132.02s

Pull #2 Analysis

Analysis of pull from 148.40s to 152.86s

Pull #3 Analysis

Analysis of pull from 178.92s to 184.94s

Knock Summary - NORMAL KNOCK at LOW LOAD

Overall knock assessment: NORMAL KNOCK at LOW LOAD (worst knock: -0.80°)

  • Worst knock timing reduction: -0.80°
  • Assessment: NORMAL KNOCK at LOW LOAD
  • 2.5T TFSI: 5 cylinders + average
  • Green bars: No knock or acceptable knock
  • Orange/Red bars: Concerning knock levels

Knock Timeline - 2.5T TFSI

Knock activity over time - 5 cylinders + average

  • 2.5T TFSI: 5-cylinder inline engine
  • Per-cylinder knock shown with unique colors
  • Knock Average shown as white dashed line
  • Load overlay shows engine demand context

HPF Fuel Pressure - System Check

High pressure fuel system: Min 2.0 MPa | Max 24.7 MPa | Avg 9.1 MPa (threshold: 11.0 MPa)

LPF Fuel Pressure - System Check

Low pressure fuel system maintained 611.0-803.0 kPa (threshold: 400 kPa minimum under load)

Lambda/AFR - System Check

Lambda: Min 0.688 | Max 1.992 | Avg 1.163 (Rich limit: 0.73, Lean limit: 1.1)

Boost Control - System Check

[CRITICAL] Boost control issues detected — 3 violation events detected

Charge Air Temperature - System Check

Intake air temp after intercooler: 24.8-28.5°C (Avg: 26.8°C) | Safe <50°C, Warning 60°C, Critical >70°C

Ethanol Content Analysis

Fuel Type

Pump Gas

Range

0% - 9%

Fuel System Status

Healthy

Running on pump gas (E0) with healthy fuel system. No fuel pressure concerns detected.

Low Pressure Fuel (LPF) Analysis

LPF actual pressure with engine load overlay

High Pressure Fuel (HPF) Analysis

HPF actual pressure monitoring with engine load overlay

Injector Pulse Width Analysis

Injector pulse width shows all cylinders within safe limits

  • Maximum Pulse Width: 4.90 ms
  • Critical Threshold: 10.0 ms (only checked at load >140%)
  • Status: Within Limits

LP injector duty cycle: Peak 8.5% — within limits (limit: 95%)