Channel data decoded from Holley EFI CAN output at 1 Mbit/s. Uses 29-bit extended IDs; the gauge matches frames regardless of the ECU serial number they carry.
Holley EFI broadcasts individual channel IDs using 29-bit extended CAN frames. The upper 21 bits identify the channel — the lower 11 bits encode the ECU serial number and are automatically masked by the gauge. Enable CAN Dash Output in Holley EFI software and set the bus speed to 1 Mbit/s.
| CAN ID (upper 21 bits) | Signal | Unit / Notes |
|---|---|---|
| 0x1E005000 | Engine RPM | rpm |
| 0x1E019000 | AFR 1 (Wideband) | AFR |
| 0x1E05D000 | Knock Retard | ° |
| 0x1E071000 | MAP / Boost | psi (gauge) |
| 0x1E075000 | Throttle Position (TPS) | % |
| 0x1E079000 | Intake Air Temp (IAT) | °C |
| 0x1E07D000 | Coolant Temp (CLT) | °C |
| 0x1E081000 | Barometric Pressure | kPa |
| 0x1E085000 | Battery Voltage | V |
| 0x1E089000 | Oil Pressure | psi (gauge) |
| 0x1E08D000 | Fuel Pressure | psi (gauge) |
| 0x1E36D000 | Gear | number |
| 0x1E371000 | Vehicle Speed | km/h |