User Documentation
Speed density conversion
2005-2008 VW 2.5 ECUs

Introduction

The speed density conversion (MAF-less) is a service we offer to get rid of the MAF sensor on earlier 2.5 engines. For naturally aspirated and forced induction setups.

This is for 2005-2008 VW 2.5 running the Bosch ME7.1.1 ECU. The 2009+ does not have a MAF sensor from factory.

Requirements

  • MAF-less option purchased
  • MK6 MAP sensor (or provided MAP)
  • Provided wire for the IAT sensor (integrated within the new MAP sensor)

Wiring the IAT to the ECU

To simplify wiring, we re-use the wire the MAF used to provide the IAT signal to the ECU

  1. Insert the provided wire in the slot #2 on the MAP sensor connector
  2. Cut the purple wire at pin #1 on the MAF connector
  3. Crimp/solder the wire you inserted with the purple wire you just cut

 

You can validate the wiring/IAT signal by looking at the reported IAT value on live data (using the logger, VCDS, OBD11)