Honda Car Forum

hey i have a 1990 honda crx dx obd0 and i'm trying to swap a 94 obd1 b18b1 into it i need to know what wiring i will need to do this swap i have all mounts i have both ecu's and and the whole wiring harness for the b18b1 and crx dx can i splice the 2 harnesses to make one?i have a junper harness for the obd0 to obd1 my big question is if i can splice the 2 wiring harnesses together.

you can splice them together but in doing a swap you will have extra wires or censors that will not read it varies from motor to motor

Car not worth the swap in my opinion.

You already have the jumper to plug in the ECU so you should be able to use your existing engine harness. (unwrap it and move things around). A lot of the plugs are the same and go to the same sensors. The main wiring is going to be the distributer, injectors and the 4 wire o2 sensor. (your jumper harness should have extra wires coming out for these) I think that one of the temp. sensors on the back of the block has a different plug. The TPS on the DPFI spins the opposite way as the MPFI so see if they already compensated for it in in the jumper??? (the two out side wires) Solder and shrink wrap any connections you make. Try to find some wiring diagrams for both cars.... Get it to run and see if you are throwing codes and go from there.