MegaSquirt Build Troubleshooter

Your build won't run?
We find out why. Free.

Upload your .msq, get a 20-rule diagnostic in under 10 seconds. Pay $15–$35 per fix or $100 flat for unlimited.

// Step 1 — Upload your .msq

Diagnose your MegaSquirt build

Upload your TunerStudio .msq project file. We run 20 sanity checks against MS3/MS3X firmware and flag every real issue we find. Scan is free. Only pay for the fixes you want applied.

Drop your .msq file here

or click below to browse — max 5 MB

Your .msq stays private — never shared, never used for anything else
01 / Upload

Drop your .msq. 5 MB limit.

02 / Free scan

20 sanity rules. See every issue + fix steps.

03 / Patched file

Pay per fix (or $100 unlimited). Download patched .msq.