Hello i am new here and really need some help. I have a 93 lude H23A1 OBD1 auto trans, and I am going to swap with a H23 vtec. My current ecu has the wire connection pin for vtec so i can make a harness to tap into, but will my original ECU work, and have it tuned or will i have to change it out. i see a lot of talk on the P13 but that is for a MT not auto. I know i have to swap the Knock sensor is there any other sensors that may need to be changed as well.

 

The blue top probably has the saturated injectors that don't require a resistor box, which is easy enough to bypass. The ecu in your car will run very rich as it is intended for 240cc injectors, get a po6 out of a junkyard civic and get it chipped and an h23v basemap installed.