Cars · Sensors
PK3 ECU Technical Reference
Technical overview of the PK3 ECU used in 1990-1991 Honda Prelude B20A DOHC non-VTEC engines.
The PK3 ECU was utilized in the 1990â1991 Honda Prelude equipped with the B20A DOHC non-VTEC engine.
Note
This ECU utilizes an electronic advance ignition system.
Specifications
| Attribute | Detail |
|---|---|
| Vehicle | 1990â1991 Honda Prelude |
| Engine | B20A (DOHC Non-VTEC) |
| OBD Generation | OBD0 |
| Ignition Type | Electronic Advance |
System Overview
The PK3 is a specialized OBD0-era ECU designed for the B20A engine platform. Unlike later VTEC-enabled ECUs, the PK3 is optimized for the specific fuel and ignition mapping requirements of the DOHC non-VTEC B-series engine found in the BA chassis Prelude.
Important
Ensure all sensor grounds are verified when troubleshooting ignition timing or fuel delivery issues on this unit, as OBD0 systems are highly sensitive to ground offsets.
Applies to
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Cars
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Honda
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Model
Prelude
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