HP Tuners & EFILive log analysis
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A boosted 6.0 LS, checked like a pro would
One real HP Tuners log from a 2005 Silverado 6.0 LS with a GT45 turbo.
- Knock under load
Peak 5.71° at 1500–2000 rpm, in 12 of 19 pulls.
hard stop - Fuel trims
LTFT -0.08% / +0.53%.
calm - WOT fueling
No WOT pull in this log. It tells you what to log next.
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2005 Chevy Silverado 6.0 LS · Part-throttle / cruise · Generated July 18, 2026. Original six-page report. Recommendations apply to this vehicle and log; this is not a before-and-after result.
Read the full six-page report
Source PDF · Page 1 of 6
StreetTunedAI — Log Review long drive.csv Platform: LS · Vehicle: 2005 chevy silverado 6.0 ls Generated 7/18/2026, 8:33:26 PM · Uploaded 7/18/2026, 7:17:46 PM Part-throttle / cruise log · Channels: 19 · Rows: 14009 Wideband present KR present MAF missing Action First — Stop driving until resolved Knock retard under load — peak 5.71° occurring at real load (MAP >= 70 kPa or pedal/throttle >= 40%, RPM >= 1500). Do not advance timing. Check fuel quality, IAT, and the timing table. Note: 362 of 1241 knock events were at low load and may be noise — focus on the under-load events. Confirm this is the live per-event Knock Retard, not a stored/total knock value, before pulling timing. STREETTUNEDAI REVIEW Bottom line HARD STOP — this log shows knock retard under load. Peak KR was 5.71° at real load, so do not advance timing or make power-adding changes from this log. This was a part-throttle / cruise log, not a WOT/PE pull, so boost control, PE fueling, and WOT safety cannot be evaluated yet. What the data shows Log parsed cleanly: 14009 rows, 19 recognized review channels, boosted LS/P59 setup, speed-density context. This was part-throttle / cruise: Peak MAP: 112 kPa Peak RPM: 3684.5 Peak throttle: 48.2% WOT samples: 0 Analyzer found no WOT / PE hit, so PE fueling cannot be judged. Fuel trims look calm during the logged driving: Bank 1 STFT avg: -0.22% Bank 2 STFT avg: 0.67% Bank 1 LTFT avg: -0.08% Bank 2 LTFT avg: 0.53% LTFTs were active, with average learned correction at 0.23%, so there is no large learned correction showing in this part-throttle data. Knock is the issue: Idle/low range: Avg KR: 0.45° Max KR: 0.88° 58 rows MAP range: 61–63 kPa Longest event: 3651 ms This is mild and could be noise/mechanical/sensor-related. 1500–2000 rpm range: Avg KR: 1.17° Max KR: 5.71° 1595 rows MAP range: 50–91 kPa StreetTunedAI · Log Review Page 1 of 6
Source PDF · Page 2 of 6
Longest event: 16793 ms Repeated in 12 of 19 qualifying pulls This is the part that matters. It repeated under load, so it cannot be dismissed as one random blip. The analyzer also noted that 362 of 1241 knock events were at low load, which may be noise, but the under-load KR is still the hard stop. Air/load snapshot: Peak MAP: 112 kPa Peak RPM: 3684.5 Peak IAT: 100.4°F No boost event was captured, so wastegate control and boost tracking cannot be evaluated from this log. What I’d verify first Before touching the tune hard, verify the KR source: Confirm this is the live per-event Knock Retard channel, not a stored/total knock value. Check fuel quality and the actual conditions during the KR. Review IAT-related behavior, especially since your notes mention excluding rows where IAT is pegged at 284°F for meth failsafe testing. This log’s peak IAT reported by the analyzer was 100.4°F, but the general point still matters: don’t judge fuel/spark from failsafe-forced rows. Check for false knock sources: Exhaust contact Loose brackets Downpipe/crossover contact Converter/trans noise Knock sensor mounting/wiring Because the KR repeated in the 1500–2000 rpm area across 12 of 19 qualifying pulls, treat it seriously until proven false. Also, do not use this log to make a WOT fueling call. The wideband channel was present, but there was no WOT data, so measured WOT AFR was not evaluated. What to change first First edit path from the analysis: Pull 1–2° timing in the exact 1500–2000 rpm cells where KR occurred. Manually blend/smooth around those areas. Before making the timing edit, verify HP Tuners Interpolate is OFF unless you intentionally want it spreading the change into neighboring cells. Relog and confirm the KR is actually reduced/resolved before changing anything else. No PE fuel edit yet. The analyzer specifically says WOT/PE data was not captured. Leave alone for now Do not touch these yet: PE fueling — no WOT/PE data in this log. WOT spark — no clean WOT pull, and KR needs to be resolved/verified first. Boost target changes — no boost event was captured, so boost tracking cannot be evaluated. Injector data — do not change it without confirming fuel pressure and wideband behavior first. Virtual VE / SD table — analyzer says not to touch it from this log alone. Idle airflow and throttle follower/cracker settings — this was not a startup/idle diagnostic log. Misfire diagnostics — not enough here to make that call. Confidence StreetTunedAI · Log Review Page 2 of 6
Source PDF · Page 3 of 6
Channel identification: high — 19 channels matched cleanly. Fuel trim read: high — STFT and LTFT were both present, and LTFT had learned. Knock read: high — knock events were classified against load channels. Startup: not evaluated — no start or idle section. WOT: not evaluated — no WOT / power-enrichment data in this log. Next log Do two separate logs. Part-throttle VE/SD cleanup log: Fully warmed up. 10–15 minutes of smooth driving. No WOT. Cruise in multiple gears at steady throttle. Use STFT/LTFT averages by RPM and MAP load cell for VE correction work. Since this is SD, MAP and RPM are the main load axes. WOT validation log after part-throttle cleanup: Wideband required. Clean full-throttle run in an appropriate gear, starting at a safe engine speed. Log: Commanded EQ/lambda Wideband AFR/lambda KR MAP Injector pulse width Timing Fuel pressure MAF Hz is secondary on SD; MAP and RPM matter most. What I couldn’t see No WOT / PE data was captured, so PE fueling, WOT AFR, WOT spark behavior, and full-load safety cannot be evaluated. No boost event was captured, so boost tracking and wastegate control cannot be evaluated. Torque management cannot be confirmed because the needed TM channels were not in this log. No TM intervention was detected in the channels that were logged, but that does not prove TM was absent. No MAF channel was logged. For this SD setup, MAF is not required, but MAF-based corrections are not available from this log. BIGGEST RISKS — HARD STOPS Knock retard under load — peak 5.71° occurring at real load (MAP >= 70 kPa or pedal/throttle >= 40%, RPM >= 1500). Do not advance timing. Check fuel quality, IAT, and the timing table. Note: 362 of 1241 knock events were at low load and may be noise — focus on the under-load events. Confirm this is the live per-event Knock Retard, not a stored/total knock value, before pulling timing. WHAT I RECEIVED CONFIRMED SUSPECT MISSING + Wideband AFR × MAF + Knock Retard + Commanded Fueling Vehicle context confirmed: 2005 chevy silverado 6.0 ls 4l80e Filename: long drive.csv StreetTunedAI · Log Review Page 3 of 6
Source PDF · Page 4 of 6
Platform: ls Parser: phase1 | Encoding: utf-8 | Delimiter: "," Rows parsed: 14009 Recognized review channels: 19 / CSV columns: 31 — closed loop active, commanded afr, commanded eq ratio, ect, fuel rail pressure, iat, injector pulse width, knock retard, ltft bank 1, ltft bank 2, map kpa, rpm, spark, stft bank 1, stft bank 2, throttle position, time, vehicle speed, wideband afr Note: CSV columns includes all raw columns; recognized review channels are those the analyzer matched to known tuning parameters. Boosted induction detected. PCM / ECM: p59 Airflow mode (MAF / SD): 3 bar sd MAP sensor: gm 3 bar ls9 Injectors: 80 lb/hr decapped stock injectors Forced induction: turbo gt45 Fuel: 91 octane with 100% methanol WHAT I SEE Bank 1 STFT avg: -0.22%, Bank 2 STFT avg: 0.67%. Bank 1 LTFT avg: -0.08%, Bank 2 LTFT avg: 0.53%. LTFTs are active (avg 0.23%) — no large learned correction at this time. KR detected in 2 RPM range(s). Most notable: 1500–2000 rpm (avg 1.17°, max 5.71°). Moderate KR — consider pulling 1° in that range and blending around it. No boost event was captured in this log. Peak MAP reached 112 kPa during startup / idle / light throttle operation. Boost tracking and wastegate control cannot be evaluated from this log. LOG TYPE & STARTUP Part-throttle / cruise log. Engine was driven at part throttle with no wide-open-throttle power-enrichment hits. Log type: Part-throttle / cruise log. Engine was driven at part throttle with no wide-open-throttle power-enrichment hits. No start or idle section in this log — startup diagnostics do not apply. CONFIDENCE BY SECTION Confidence is per section, not one overall score. Finding a channel is not the same as being sure about the conclusion. Channel ID: high — Matched 19 channels cleanly. Fuel trim: high — STFT and LTFT both present and LTFT has learned a correction. WOT: not evaluated — No WOT / power-enrichment data in this log. Knock: high — Knock events classified against load channels. Startup: not evaluated — No start or idle section in this log — startup diagnostics do not apply. FUEL TRIM ANALYSIS (STFT / LTFT) Avg STFT B1: -0.22% Avg STFT B2: +0.67% Avg LTFT B1: -0.08% Avg LTFT B2: +0.53% LTFT learned: Yes STFT carrying load: No Bank 1 STFT avg: -0.22%, Bank 2 STFT avg: 0.67%. Bank 1 LTFT avg: -0.08%, Bank 2 LTFT avg: 0.53%. LTFTs are active (avg 0.23%) — no large learned correction at this time. KNOCK / SPARK REVIEW RPM Range Avg KR Max KR Severity Rows idle/low 0.5° 0.9° MILD 58 1500–2000 rpm 1.2° 5.7° MODERATE 1595 StreetTunedAI · Log Review Page 4 of 6
Source PDF · Page 5 of 6
KR by RPM range: idle/low: avg 0.45°, max 0.88° (58 rows, MAP 61–63 kPa, longest event 3651 ms) — mild 1500–2000 rpm: avg 1.17°, max 5.71° (1595 rows, MAP 50–91 kPa, longest event 16793 ms — repeated in 12 of 19 qualifying pulls) — moderate Moderate to severe KR in: 1500–2000 rpm. Do not add timing. Pull 1–2° in the exact cell(s) where KR occurred, then manually smooth the surrounding cells yourself — do not rely on HP Tuners Interpolate to do that blending automatically. Before making any edit, verify Interpolate is OFF unless you intentionally want it spreading the change into neighboring cells. Relog and confirm. Possible causes include timing too aggressive for the fuel and conditions, fuel delivery variation, IAT, or false knock from a loose sensor — review knock sensor mounting and wiring before assuming the tune needs a large correction. The following ranges showed KR on multiple loaded events: 1500–2000 rpm (12 of 19 qualifying pulls, longest event 16793 ms). A repeating pattern across multiple pulls is a stronger indication of a consistent condition than a single spike, but the cause still needs to be confirmed — do not assume it is the tune without ruling out fuel quality, IAT, false knock, and sensor issues first. WOT / POWER ENRICHMENT WOT hits detected: 0 Longest pull (rows): 0 Wideband present: Yes TC intervention: No Commanded AFR range: — Numeric WOT edits safe: No Blockers preventing numeric edits: WOT pull is too short for reliable fueling evaluation. Record a clean pull in an appropriate gear starting at a safe engine speed. No WOT data detected in this log. TPS did not reach 80% and pedal/PE/load criteria were not met. No WOT data in this log. PE fueling cannot be evaluated. AIRFLOW & LOAD Peak MAP: 112 kPa (boosted). Peak RPM in log: 3684.5. Peak IAT: 100.4°F. TORQUE MANAGEMENT Torque management cannot be confirmed from this log unless the needed TM channels are present. No TM intervention was detected in the channels that were logged, but this does not confirm TM was absent — TM channels were not in this log. FIRST EDIT PATH First edit: Pull 1–2° of timing in 1500–2000 rpm and blend around those areas. Relog to confirm KR is resolved before any other changes. PE / WOT: No PE fuel edit yet. WOT pull is too short for reliable fueling evaluation. Record a clean pull in an appropriate gear starting at a safe engine speed. DO NOT TOUCH PE fueling WOT spark Boost target changes without confirming boost tracking in the log Injector data (without confirming fuel pressure and wideband first) Virtual VE / SD table (MAF not logged — cannot confirm SD operation) Idle airflow and throttle follower/cracker settings Misfire diagnostics based on this log alone NEXT LOG PLAN Part-throttle VE/SD log: StreetTunedAI · Log Review Page 5 of 6
Source PDF · Page 6 of 6
Fully warmed up. 10–15 minutes of smooth driving. No WOT. Let the car cruise in multiple gears at steady throttle. The primary correction target is the VE (Volumetric Efficiency) table, not the MAF table. STFT/LTFT averages by RPM and MAP load cell are the key inputs for VE corrections. WOT validation log (after part-throttle cleanup): Wideband required. Conduct any high-load or full-throttle testing safely and legally. Leave traction control on unless disabling it is explicitly appropriate and safe for your vehicle and environment. Record a clean full-throttle run in an appropriate gear starting at a safe engine speed. Log: commanded EQ/lambda, wideband AFR/lambda, KR, MAP, injector pulse width, timing, and fuel pressure. MAF Hz is secondary on SD — MAP and RPM are the primary load axes. BOTTOM LINE This calibration shows at least one hard-stop condition that should be resolved before further driving. See the Biggest Risks section above. Follow the Next Log Plan above to continue narrowing the tune. This review is supported-interpretation-only. A scan log alone cannot prove the calibration is safe; verify all values in HP Tuners before applying. StreetTunedAI · Log Review Page 6 of 6 Conservative analysis only. Verify all values in HP Tuners before applying. Numeric edits require valid wideband, KR, and load data; do not apply WOT changes from a partial or unverified log.
From the builder
Why I built StreetTunedAI
I never meant to sell this. It started as a personal tool for my own tuning workflow, and I worked on it every day for 18 months. Today it's a deterministic analyzer built around HP Tuners logs, with an AI that only reports what the analyzer finds. 500+ people use it. It never touches your PCM. — Bryan
Read the Full Story
I never meant to sell this. It started as a personal tool to help me remember my tuning workflow. At first it was a custom GPT I taught my tuning notes, limits and hard stops.
For 18 months I worked on it every day, and it grew into what it is today: a deterministic analyzer built around HP Tuners logs, with an AI that only reports what the analyzer finds. There's also an assistant built around HP Tuners that answers your tuning questions.
One day I was reading a forum and saw a guy ask a simple fueling question after a cam swap, and a "tuner" talked down to him. That ticked me off. I messaged him and gave him my assistant. The next day his whole truck was tuned with fuel trims within ±2%.
He told me I needed to sell it. That's how StreetTunedAI started. Today 500+ people use it. It never touches your PCM, and you stay in control of every change. Patent pending.
— Bryan
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Common questions
Is this just ChatGPT?
No. Your log goes through StreetTunedAI's own parser built for HP Tuners and EFILive exports. It checks which channels are trustworthy, finds the operating areas (idle, cruise, WOT, boost) and applies hard safety stops before any explanation is written. The AI explains the findings; it can't override a safety stop or invent a number that isn't in your log.
Will it change my tune or touch my PCM?
No. StreetTunedAI never connects to your vehicle or writes a file. It tells you what the data supports and which cells to look at. You make every change yourself in HP Tuners, so you stay in control.
What if my log is missing data?
It tells you exactly what's missing before suggesting anything. A missing or suspect wideband, active knock or a fuel-pressure problem blocks the related changes, and you get a list of what to log next.
How much does it cost?
Your first LS/LT log review is free, no card needed. Full access is $74.99, a one-time payment that includes your first 30 days of unlimited reviews. After that, nothing bills automatically: pick $20/month unlimited or $10/month for 10 reviews in your account. Monthly plans renew until you cancel. All sales are final once access is granted; see the refund policy.
Which engines are supported?
GM LS/LT, Ford Coyote, Duramax and Mopar are live in the portal. Cummins and EcoBoost are coming soon.
How do I try it?
Create a free account and upload one real HP Tuners or EFILive log. You can also see a full sample review in the live demo, no account needed.
How does it work?
1. Your raw HP Tuners log. Export the CSV from VCM Scanner (EFILive works too) and upload it. Thousands of rows, dozens of channels.
2. StreetTunedAI checks it. Trusted vs. suspect channels, idle, cruise, WOT and boost areas, knock, fueling and airflow, with hard safety stops.
3. A clear action list. What to fix first, which cells, what to leave alone and exactly what to log next. Make the change, log again, repeat.
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