Reported Bugs

  • Status Requires testing   Reopened
  • Percent Complete
    90%
  • Category 07K ME17.5 (2009+)
  • Assigned To
    Jason
  • Priority Medium
Attached to Project: Reported Bugs
Opened by Jason - 05.10.2025
Last edited by Jason - 14.04.2026

FS#4 - Passat firmware, fuel suppression and difficulty to log

Description

Passat firmwares differ from the Golf/Jetta/Rabbit, including fuel suppression to match stricter emissions.
This prevents the crackles and launch control from being "aggressive" (Low priority, this issue is only entertained out of respect for existing customers)

The concerning issues regarding Passat firmware is that they can be harder to tune and log. With the raise of interest from Passat owners for more serious builds, the remedy is to adapt a Golf firmware to support Passat as well

Admin
Jason commented on 05.10.2025 22:10

Awaiting feedback from the customer testing the Golf firmware on the Passat

Admin
Jason commented on 20.01.2026 02:08

Feedback not yet received

Admin
Jason commented on 15.03.2026 08:48

No feedback received, although logging on a different affected vehicle has allowed to confirm the source of the fuel suppression

A patch has been written, and is under testing

Admin
Jason commented on 08.04.2026 05:31

The function responsible for the fuel suppression has been identified and patched. Final tests are ongoing

Admin
Jason commented on 09.04.2026 06:08

The fuel suppression fix is effective, but prevents the cruise control switch from disabling the crackle on demand (Need additional patch & testing)

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