VQLab
V35 · 2003–2006

Nissan Skyline / Infiniti G35 ECU tuning

Back up, tune and flash the Skyline / G35's VQ35DE through the OBD port, with VQLab and a $10 K-line cable. No ECU to open.

Download Lite, freeSee Pro
Nissan Skyline / Infiniti G35✓ Supported
NATS delete (CM46A, beta)

Supported ECU software versions

Software IDFitted to
AC401G35 / Skyline coupe 2004, 5-speed auto
AM604G35 2003, automatic
AM900Skyline 2004, JDM 6-speed manual
AM905Skyline 2004, JDM 6-speed manual
CM46AG35 sedan 2005, automatic

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 / G35'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: AC401 (G35 / Skyline coupe 2004, 5-speed auto), AM604 (G35 2003, automatic), AM900 (Skyline 2004, JDM 6-speed manual), AM905 (Skyline 2004, JDM 6-speed manual), CM46A (G35 sedan 2005, automatic). 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