ok, i plan on upgrading my 90 DA to obd1 in a couple weeks when the wiring gets in and i get off my a$$ to solder my ecu but my question is, i have an AEM wideband with a narrowband output going to my ecu and it takes up my stock o2 sensor bung. when i upgrade i want to keep my wideband but i know this will throw a code because it wont see the heater from the 4 wire. what do i need to do in order to keep my wideband but not get a CEL from the missing 4 wire?
the ECU looks for 10 - 40 Ω all you would have to do is wire in a resistor between the two wires… 20watt resistor should be good. the resistor will get hot though so you should take care where you put it.
what size?
10 - 40 Ω
im not sure what they have at radioshack but if you find something along that range with 10 - 20 watts you should be good.