This information applies to all 1990-1993 Honda Accord with manual transmission.
ECU location: passenger side footwell against the firewall (under carpet).
Factory ECU connector style: OBD1
The stock 90-93 Accord ECU is difficult to modify or reprogram, so for performance use an ECU swap is recommended. Luckily, the common OBD1 civic/integra style ECU's will plug directly into the stock wiring harness without any modifications. The OBD1 civic/integra style ECU's like the P06, P28, and P72 are all chippable/programmable with the proper equipment. For this reason, we recommend the following ECU's:
For Non-vtec engine applications, we recommend any of the following:
For VTEC engine applications, we recommend any of the following: