88-91 Honda Civic Application Guide

The 1988-1991 Honda Civic is the beginning of the Honda engine tuning scene and offers many different engine and computer combination possibilities.

Manual transmission models:

The 1988-1991 Honda Civic DX uses a 2-injector dual port fuel injected (DPFI) engine. This DPFI engine setup is not currently supported by any of our tuning systems. It is recommended to convert the engine over to multi-port fuel injection so that our tuning systems can be used on this vehicle. In order to do so, you will need a DPFI to OBD1 ECU conversion harness, OBD1 tunable ECU, distributor from a 92-00 civic or 92-01 integra, and a complete multi-port fuel injection intake manifold setup with fuel injectors, throttle body, etc. If you have swapped in a different MPFI engine (ie: D16Z6, B16, etc), then simply use your stock engine's wire harness on the new engine and modify it as needed to fit the engine. You will then use a DPFI to OBD1 ECU conversion harness at the ECU plugs so that you can use one of our tunable OBD1 ECU's.

The 1988-1991 Civic EX and Si models use a multi-port fuel injected engine. The stock OBD0 style ECU is not supported by our tuning systems. It is recommended to convert the vehicle to OBD1 in order to use one of our OBD1 tunable ECU's. In order to do so you will need an OBD0 MPFI to OBD1 ECU jumper harness, 92-00 civic distributor that fits onto your engine, and any of our OBD1 tunable ECU's. If you have swapped in a different engine (ie: D16Z6, B16A, etc), then simply use the distributor from that engine. You will need to use your stock engine's wire harness on the new engine and modify it as needed to fit onto the engine. You will then use an OBD0 to OBD1 ECU jumper harness at the ECU plugs so that you can plug in one of our tunable OBD1 ECU's.

Automatic transmission models:

Currently not supported.