# Ultra Affordable EFI for Honda OBD1

## Community Support

🔴Community support ONLY 🔴 https://www.facebook.com/groups/rusEfi 🔴 [Discord](https://github.com/rusefi/rusefi/wiki/Discord)🔴

## Technical Details

See https://github.com/rusefi/rusefi/wiki/uaEFI

[pinout](https://rusefi.com/docs/pinouts/uaefi/honda-obd1/)

[Schematics rev a](Hardware/Hellen/uaefi-Honda-OBD1-adapter-a-schematic.pdf)

## Features

* on-board LSU 4.9 controller exposed on extra ECU plug
* flex fuel sensor input exposed on extra ECU plug
* option to use coil on plugs see J4
* option to convert to hall position sensors see J5
* option to upgrade to electronic throttle body J1+J2

## Micro Fit

* harness side 2x3 0430250600
* harness side 2x4 0430250808
* harness side terminal 0430300001
* PCB side 2x3 0430450612

See https://github.com/rusefi/rusefi/wiki/Vault-Of-Honda-OEM#obd-1

## OEM Cases

37820-p2e OBD2 case looks very similar to P28 OBD1 case