Some models supported by the G4X MX5Link Plug-In ECU require additional installation modifications. The following modifications may be required:
·Fuel Pump Control – Some models have a switch fitted inside the AFM that disables the fuel pump when the engine is drawing no air. Depending on the way the AFM is wired it may be necessary to either bypass the AFM switch or wire a separate ECU controlled Fuel Pump Relay. Bridging the BLK and LT-GRN will allow the AFM to be removed:
MX5 AFM Wiring
·Throttle Position Sensor (TPS) – Miata/MX5 1600cc models do not have a factory fitted TPS. A TPS should be installed and wired to the ECUs expansion connector. This is required for functions such as acceleration enrichment, idle speed control and motor sport features.
·The Mazda GTX has four injectors, but they are operated in group fire mode. In PCLink connect to the ECU and go to the Fuel Setup section. Store the configuration (F4) and switch the ignition off and back on again. Change the Injection Mode to Multi-Point Group and also set the Active Drives to INJ1-2.