Frequently asked questions

What is TuneView?

TuneView is an evidence-based tune review tool. You upload a datalog from HP Tuners VCM Scanner, and the in-house parser assesses your tune health across multiple systems, including knock/spark, airflow, fuel pressure, torque, thermal, and startup. It returns a grade and P1-P4 revision priorities. P1 is critical (safety or reliability), P2 is high, P3 is moderate, and P4 is informational. The report also includes specific HP Tuners table and cell guidance where the evidence supports it.

What are P1-P4 revision priorities?

Every finding is ranked by priority: P1 is critical (safety or reliability), P2 is high (clear improvement supported by evidence), P3 is moderate (supported by evidence but lower impact), and P4 is informational (worth monitoring but not urgent). Your report presents them in priority order so you know what to address first.

What does the revision cycle look like?

You upload a baseline log and receive an assessment. Then you apply the P1-P2 revisions in HP Tuners, drive, re-log, and upload the follow-up. The parser compares the two logs and issues an effectiveness verdict: improved, no change, or worse. That verification loop is the core product.

Does TuneView modify my ECU or tune file?

No. TuneView is read-only. It reads your datalog and tells you what to change and where, but it never touches your ECU, calibration file, or any hardware. You make all edits yourself in HP Tuners VCM Editor.

What role does AI play?

The in-house parser is the decision layer. It sets grades, detects issues, and selects revision priorities. AI is used only to explain findings in plain language. AI cannot override grades, thresholds, or revision selections.

What file format does TuneView accept?

TuneView accepts CSV exports from HP Tuners VCM Scanner and HPL log files. When you finish logging in Scanner, go to File > Export Data > CSV. Both formats are accepted up to 50 MB. If your connection drops during upload, TuneView automatically resumes from where it left off. You can also attach a calibration file (.hpt or .efi) for tuner review, or a dyno sheet (PDF or image) when uploading a follow-up round.

What log channels do I need?

At minimum, log Engine RPM, Throttle Position, and Knock Retard. For full coverage, also add MAP, MAF, Fuel Rail Pressure (commanded + actual), Spark Advance, and Accelerator Pedal Position. See the full list at /log-channels.

How big can my log file be?

The limit is 50 MB. Most HP Tuners CSV exports are well under this limit.

What makes a good log?

A good log is a clean wide-open throttle (WOT) pull with the required channels logging. The parser looks for a meaningful load event, with an RPM gain of at least 500 and throttle above 40% for at least 10 samples. Idle-only or very short logs may not contain enough data for a full assessment. For per-cylinder knock isolation, add the per-cylinder knock channels to your VCM Scanner configuration. They are not in the default list. Adding them costs nothing and is the difference between "the engine knocked" and "cylinder 7 knocked and the other seven did not."

What if my log is missing channels?

The parser works with what you provide. Missing channels reduce coverage. For example, no MAP channel means no boost analysis. The report will note which systems could not be assessed and why.

What engines does TuneView support?

TuneView analyzes GM Gen 3, Gen 4, and Gen 5 engine families. Gen 5 is the 2014 and newer LT and L8x platforms (L83, L86, L87, LT1, LT4, LT5) in Silverado and Sierra trucks, Camaro, Corvette, and CT5-V. Gen 4 is the LS-series cars and the 2007 and newer variable-cam trucks (LS2, LS3, LS7, LS9, LSA, L76, LY6, L92). Gen 3 is the 1997 through 2007 LS engines (LS1, LS6, LR4, LM7, L59, LM4, L33, LQ4, LQ9). Knowledge base depth is deepest on Gen 5 and keeps growing on Gen 3 and Gen 4, and every report names the systems it could not assess and why.

Do you support LS-based (Gen 3 and Gen 4) engines?

Yes. You choose your exact engine code when you set up the vehicle, and the analysis stays inside that generation: no Gen 5 direct-injection or variable-cam assumption is applied to an engine that does not have it, and Gen 3 controller context (P01 and P59 controllers, narrowband oxygen sensors, no variable cam) is stated in the report. Knowledge depth still varies by family. Gen 5 is deepest, Gen 4 is substantial, and Gen 3 is thinner and grows as reviewed tune files and logs come in. Check the Knowledge Base at /kb to see entry counts per family.

Can I check my table edits before flashing?

Yes. After you apply TuneView's recommended revisions in HP Tuners VCM Editor, go to the Verify page. You can either paste a Copy-with-Axis table (VVE, MAF, or Virtual Torque) or upload a screenshot of the cells you changed. TuneView checks each cell against the recommended values and reports pass or fail, so a copy error never reaches your engine. For Virtual Torque, TuneView also checks that you copied the correct Table Grouping, spark page, and unit.

What is the report card structure?

The report card reads in three altitudes. In five seconds, you see a verdict strip with the grade, why it is capped, the one repair to make first, and what the safety guard is doing. Within thirty seconds, you see one card per system with the decision-driving numbers, each tagged with its measurement source. Healthy systems collapse to a single line. When you need more detail, you can open a full detail drawer for each finding with complete instructions, the datalog chart, and physical checks with both outcomes. At the bottom, one evidence panel covers channel coverage, knock causes, source declarations, and grading policy. You can download the full report as a print-ready PDF.

Does TuneView account for altitude?

Yes. Knock is judged using the barometric pressure you logged, not a sea-level assumption. If your log includes a MAP-to-barometric ratio channel, TuneView uses it directly. If it includes barometric pressure, that measured value becomes the reference. Only when neither was logged does the sea-level assumption remain, and the report says so in plain text instead of applying it silently.

Can I manage multiple vehicles?

Yes. Add as many vehicles as you want at no cost, with no card needed. Each vehicle gets its own session history, score progression chart, and metric sparklines. When you are ready to run an analysis, buy a Full Tune for $69 for the vehicle you want to cover. The first vehicle you analyze claims your tune and keeps it.

How much does TuneView cost?

A Full Tune costs $69 one time. It covers one vehicle/motor for unlimited analyses and revision rounds, with no expiration. See /pricing.

What does Full Tune include?

Full Tune includes the baseline analysis and every follow-up analysis and revision round for its assigned vehicle/motor.

Does Full Tune expire?

No. Full Tune has no expiration for the vehicle/motor it covers.

Can I get a refund?

If an analysis cannot be completed due to a platform or parser limitation, contact [email protected]. We work with you on a resolution for cases where the tool could not deliver.

What if a TuneView recommendation makes things worse?

That is why the verification loop exists. After you apply revisions and re-log, the parser grades the follow-up and issues a verdict: improved, no change, or worse. If a recommendation made things worse, the follow-up report will show it and the next revision plan adjusts. TuneView publishes these outcomes publicly on the Measured Results page, including the failures.

Is my data safe?

Logs are retained for 30 days and then deleted. TuneView never stores or accesses your ECU calibration. All analysis runs server-side over an encrypted connection.

Can TuneView damage my engine?

TuneView is read-only. It reads logs and recommends changes, but it never writes to your ECU or calibration file. You are always the one making edits in HP Tuners. TuneView provides the evidence and direction; the tuner makes the call.

How do I get help?

Email [email protected] for any issue.

Is there a community?

We are building community channels. Check the Contact section on the homepage for the latest links.