Customer Tuning Support

Already working with Yosh Tuned? Use this page to find the right instructions and keep your calibration moving. Always reply in your existing tuning email thread and include your order number.

1. Before your first log

Review the Pre-Tuning Checklist and Vehicle Setup Form. Confirm that the car is mechanically sound and all requested setup information is complete. The form may take a few moments to load.

2. Record and send datalogs

Follow only the instructions included with your latest calibration email. Log each requested test separately, and send the original datalog file rather than screenshots.

Read the Datalog & Revision Instructions →

Do not perform a wide-open-throttle pull until Yosh Tuned specifically requests one. Only perform requested driving tests where safe and legal.

3. Need help with your current tune?

Reply directly to your existing tuning email at tuning@yoshtuned.com. Include your order number, the calibration/revision currently installed, any warning lights or symptoms, and the relevant datalog. Please keep all replies in one thread so we can follow your vehicle's history.

If you notice a misfire, unexpected boost, concerning AFR, overheating, fuel-pressure trouble, or unusual engine noise, stop testing and report it before making another pull.

4. Changed parts or fuel after completing your tune?

If Yosh Tuned completed your tune and you later changed fuel, injectors, MAP sensor, engine parts, turbocharger, supercharger, boost level, or other calibration-related hardware, you may need the Existing Customer Re-Tune. Include your previous order number and a list of changes.

New customer or unsure which service to buy?

Start with Which Tune Do I Need? or read How E-Tuning Works. These are calibration services; tuning hardware is not included.

Common questions

See the E-Tuning FAQ for service timelines, hardware requirements, fuel types, and general tuning questions.