Complete Upgrade Package: Elite 750 & Harness for NA Miata
This kit bundles the versatile Haltech Elite 750 ECU with the Plug’n’Play Adaptor Harness for the Mazda MX-5 NA. It serves as a comprehensive engine management solution for 1990-1995 Miatas, replacing the outdated factory ECU with a modern, tunable system capable of handling forced induction, ethanol fuels, and individual throttle bodies.
Engineering for Enthusiasts
The Elite 750 offers a robust feature set including 6 fuel and 6 ignition channels, allowing for sequential injection and coil-on-plug conversions. The adaptor harness connects directly to the factory wiring, routing signals from the CAS, coolant temp sensor, and injectors to the new ECU. The kit facilitates the removal of the restrictive MAF sensor by including an air temp sensor for Speed Density tuning. It is designed to work with the factory sensors but requires a variable TPS upgrade on 1.6L models for proper load sensing.
Operational Benefits
Installing this kit provides immediate access to real-time tuning, data logging, and engine protection strategies. It supports closed-loop O2 control and idle stability features. The harness ensures that the installation is clean and professional, avoiding the pitfalls of custom wiring. It is the ideal entry point into standalone engine management for the NA chassis.
Fitment Guide
- Mazda MX-5 Miata: NA 1.6L & 1.8L (1990-1995)
- Transmission: Manual Only
Technical Specifications
| Parameter | Specification |
|---|---|
| Included ECU | Haltech Elite 750 |
| Logging | On-board Data Logging |
| Transmission | Manual Only |
| TPS Note | 1.6L requires VTPS upgrade |
Summary & Includes
Includes:
- 1 x Haltech Elite 750 ECU
- 1 x Plug’n’Play Adaptor Harness
- 1 x M14 x 1.5 Air Temp Sensor with matching plug and pins
- 1 x Auxiliary I/O 16 Pin Tyco plug and pins
- 1 x USB Programming Cable
Note: Not for OBDII models. TPS upgrade mandatory for 1.6L.
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