A well-prepared tuning file starts with a well-prepared request. A file sent with missing or wrong information slows everything down and raises the risk of the wrong software being built. This guide walks through opening a file request on MyEcuFile step by step, and the information every request should include.
What to have ready before you start
- The original file: a complete, unmodified read from the car, plus EEPROM and tool backup files where needed.
- Vehicle details: make, model, engine (engine code if you know it), model year and gearbox type.
- ECU details: ECU type and the hardware (HW) and software (SW) numbers from the label.
- Read tool and method: which tool you used and whether you read via OBD, bench or boot.
- Modifications: a list of any exhaust, intercooler, turbo or other hardware changes.
For background on read methods, see ECU reading methods.
Step by step
1. Create an account
Sign up in the MyEcuFile panel and verify your email. Your requests, messages and delivered files are kept in this account.
2. Top up credits
File requests are paid in credits. See credit costs and packages on our pricing page. The credits for the services you choose are deducted when you submit the request.
3. Select the vehicle
On the new request screen, pick the make, model, generation and engine from the catalogue. Choosing the right engine matters, because it determines the software base the file is built on. You can check your car in our vehicle catalogue beforehand.
4. Choose the service and options
Select the stage and any extra options you need. If you are not sure which stage fits, read our Stage 1 vs 2 vs 3 comparison. For fault code removal, list the exact codes; details in our DTC Off guide.
5. Upload the original file and add notes
Upload the read file. In the notes, describe hardware changes, the fuel you use, how the car is used and anything you know about the file's history. A short but complete note lets the engineer build the right file without back-and-forth.
6. Track the request
The request status updates in the panel and you get notified of important changes. You can message the engineer directly in the request chat.
7. Download and write the file
When the file is ready, download it from the request page and write it with the same tool and method you used to read. Use battery support while writing. We cover checksums in detail in this article.
Request checklist
| Information | Why it is needed |
|---|---|
| Original, unmodified file | Software is always built from the original |
| Engine and model year | Correct software base and safe limits |
| ECU type, HW/SW numbers | Correct identification of the file |
| Read tool and method | Compatible format for writing back |
| Hardware changes | Stage 2 and Stage 3 calibration |
| Gearbox type | Correct torque limits |
| Fuel (octane) and usage | Ignition and load targets |
Common mistakes
- Sending a modified file as original. If you do not know the car's history, say so. We explain why in backing up the original file.
- Mistaking a partial read for a full read. Check which areas your tool actually read.
- Choosing the wrong engine. Different power versions of the same model use different software.
- Editing the delivered file by hand. If you need a change, ask for a revision in the request chat.
Frequently asked questions
Can I open a request without knowing my ECU type?
Yes. The ECU Detect tool in the panel helps identify the ECU and likely vehicles from an uploaded file. Mention anything you are unsure of in the notes.
Can I ask for changes to a delivered file?
Yes. Message our engineer in the request chat to ask for a revision.
I lost my original file. What can I do?
With the ECU's HW and SW numbers, you can request a matching file through our original file service.