However, the ECU wiring is often the most intimidating part of a K-swap. Whether you are swapping a K20A into an EG Civic, an EK Civic, or a classic mini, understanding the ECU pinout is the difference between a start-up and a smoke show.
Confused by your K20A swap wiring? We break down the Honda K20A ECU pinout (3-plug and 4-plug variants), identifying critical circuits like VTEC, VTC, and Immobilizer bypass for your build. k20a ecu pinout