VQLab
V36 · 2009

Nissan Skyline / Infiniti G25 · G37 ECU tuning

Back up, tune and flash the Skyline / G37's VQ25HR · VQ37VHR through the OBD port, with VQLab and a $10 K-line cable. No ECU to open.

Download Lite, freeSee Pro
Nissan Skyline / Infiniti G25 · G37✓ Supported

Supported ECU software versions

Software IDFitted to
JK03ASkyline 250GT / G25 2009, VQ25HR automatic
JL04ASkyline 370GT / G37 coupe 2009, VQ37VHR manual

Not sure which one your car has? VQLab Lite reads it from the ECU when it connects, for free.

What you can tune

VQLab shows the Skyline / G37's maps as editable heatmap grids, with undo, compare and smoothing. Depending on the ECU software version, they include ignition timing, fuel targets, rev and speed limiters, airflow (MAF) scaling, injector settings and cam timing. What each map does.

How to start

  1. Get a K-line USB cable with a CH340 chip, about $10 (which cable).
  2. Back up your ECU with VQLab Lite. It's free and changes nothing in the car.
  3. Open the backup and look through every map.
  4. To edit and flash, get VQLab Pro: a one-off payment, 5 cars included.

Questions

These ECU software versions: JK03A (Skyline 250GT / G25 2009, VQ25HR automatic), JL04A (Skyline 370GT / G37 coupe 2009, VQ37VHR manual). VQLab Lite reads your ECU's software ID when it connects and tells you whether it's supported.

A K-line (KKL) USB cable with a CH340 chip, sold as a "VAG 409.1 KKL" cable for about $10. FTDI cables don't work.

No. VQLab reads and flashes the ECU through the OBD2 port under the dash. Nothing to open or solder.

Backing up and viewing every map is free with VQLab Lite. Editing and flashing needs VQLab Pro, a one-off payment that includes 5 cars.

Other supported cars