Link G4+ Plug-In ECU for Mazda MX5 1600 / 1800 Including Miata
Link G4+ Plug-In ECU for Mazda MX5 1600 / 1800 Including Miata
Link G4+ Plug-In ECU for Mazda MX5 1600 / 1800 Including Miata -NOT AVAILABLE

Link G4+ Plug-In ECU for Mazda MX5 1600 / 1800 Including Miata -NOT AVAILABLE

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NOT AVAILABLE - Now replaced with G4X - MX5NAX 212-4000

 

Read more about our Fitting and Mapping service HERE 

 

The Link G4+ range of engine management systems are already well known for delivering class-leading performance without sacrificing factory levels of drivability.

 

The G4+ plug-in ECUs are designed to be the most complete plug-in solution yet.

 

This Mazda plug-in ECU will save you time and money as it will plug straight into the vehicle’s original wiring loom without the need for messy adaptor harnesses. It replaces the original circuit board inside the factory ECU enclosure and mounts using the factory brackets.

 

This Link G4+ Mazda MX5/Miata/GTX/GTR plug-in ECU is suitable for the models listed below:

 

  • Mazda MX5 / Miata 1989-on 1600cc B6-ZE versions only
  • Mazda 323 / Familia GTX and GTR 1989-94 models with 1800cc BP-T engine
 

 

Note: Mazda MX5 / Miata models with the later 1800cc engine are NOT supported.

 

Once the installation is complete, the Link G4+ allows a good tuner to achieve an optimal state of tune to get the most out of any combination of modifications.

 

All Link G4+ plug-in ECUs come with a base map. While these maps are designed to help save time for you and your tuner, it is essential that these are used simply as a starting point for further tuning.

 

The engine can easily be converted to speed density by removing the air flow meter and instead using a suitable MAP and air temperature sensor.  Likewise, this ECU can also be setup to control boost electronically with in-cabin adjustment. This eliminates the need to purchase a separate electronic boost control system.

 

The vehicle’s original sensors & actuators are used except for the following exceptions:

 

  • MAP sensor – The MX5/Miata/Familia G4+ plug-in is provided with an on board 4.0 Bar MAP sensor. This is suitable for up to 300kpa (44psi) boost. If more boost is intended to be used a higher rated external sensor can be fitted in the engine bay and connected to the expansion connector of the ECU. The on board & external MAP sensors are also suitable for naturally aspirated applications. The airflow sensor is not required.
  • Inlet Air Temp Sensor (IAT) – For naturally aspirated applications the factory IAT sensor is supported and is suitable to use. For forced induction a suitable IAT sensor should be fitted just prior to the throttle body. This should then be connected to the expansion connector of the ECU. Alternatively options exist for modifying the factory loom to use existing wires for the IAT sensor.
  • Electronic Boost Control – In the case of the Familia GTX/GTR the factory boost solenoid wiring is used, however an appropriate boost solenoid must be used. 
  •  Injectors – The G4+ plug in is NOT designed to be used with low impedance injectors. All of the Mazda models this G4+ plug is designed for use high impedance injectors so no changes are necessary. However if low impedance aftermarket injectors have been fitted then the correct ballast resistors MUST be fitted. 
  • Throttle Position Sensor (TPS) - Some of the MX5/Miata 1600cc models do not have a factory fitted TPS. A suitable TPS needs to be fitted and connected to the expansion connector on the ECU. This is required such functions as acceleration enrichment, idle speed control and motorsport features. The 1800cc MX5/Miata & Familia GTX/GTR have factory fitted TPS that are supported.
  • Fuel Pump Wiring- Some models may require modification to the fuel pump wiring.

 

 

Extra sensor inputs

The expansion connectors on the Link G4+ board is provided to allow the easy connection of additional ECU inputs. The two expansion connectors on this particular plug-in model provides the following:

 

  • 2 x 5V Supply
  • 2 sensor grounds
  • 4 digital inputs
  • 4 analogue voltage inputs
  • 2 analogue temperature inputs

 

 

These may be used for functions such as driver adjustable boost control, switchable fuel/ignition maps, wideband lambda input, external MAP sensor, IAT sensor, fuel pressure and oil temp/pressure.

 

Outputs

Any redundant outputs may be reconfigured & used for alternative uses. Examples include, shift light, water injection, NOS control etc. 

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