OBD0 MPFI to OBD1 ECU Jumper Harness - Manual Transmission
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OBD0 MPFI to OBD1 ECU Jumper Harness - Manual Transmission

Item# MPFI-OBD0-OBD1
$119.00
Availability: In Stock

HA Motorsports OBD0 MPFI (multi-port fuel injection) to OBD1 ECU jumper/conversion harness for installing an OBD1 ECU into an OBD0 mpfi chassis. Uses all new OEM connectors for OE quality fitment. All HA Motorsports ECU jumper harnesses are constructed using cross-linked automotive TXL wire which exceeds OEM specifications and is extremely durable. Allows a straight-forward, simple conversion from OBD0 to OBD1.

    This harness is to be used for installing an OBD1 Manual transmission ECU into any of the following vehicles:

  • 88-91 Honda Civic EX or Si with manual transmission
  • 88-91 Honda CRX HF or Si with manual transmission
  • 90-91 Acura Integra with manual transmission
  • 88-91 Civic/CRX LX/DX with manual transmission that has been already converted to MPFI.


You will also need an OBD1 or OBD2 distributor that fits onto your engine. The OBD0 distributor will not work with an OBD1 ECU.

This OBD1 conversion harness includes a sub-harness for wiring in the following components:

VTEC Solenoid
VTEC Oil Pressure Switch
Knock Sensor
4 wire O2 Sensor
Intake Air Bypass Solenoid


All HA Motorsports ECU's, products, and services include a One Full-Year VIP Warranty

OBD0 to OBD1 ECU Jumper Harness Installation Instructions

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