First thread. I bought a 93 del sol a little while back. It's been motorswapped with a b20 block and b18c1 vtec gsr head. It also has a decent wire tuck. It has a 4 to 1 header then pretty much straight pipe. Theres no o2 sensor. There is a bung with a bolt where an o2 should go.
The question is. How do i get an o2 sensor back? Is there a way to put the o2 sensor in the bung run the wires inside the cab to my p28 obd1 ecu and wire it into the harness somehow. What are my options. I feel as if the Sol could be running better and MPG is horrid.

 

this all depends on the tune.
for starters, is the cel on?

 

I'm guessing it has some open loop tune done.
CEL is probly going crazy, but prev. Owner disabled it. Probably removed the bulb. I found some info on where the wires from the o2 sensor itself end up. Like the d14 wire in the back of ecu. And 2 others for pwr and grd. Hoping to just wire them directly thru the floorboard to ecu. This is all a hunch and have NO idea if itll even work. Hopping to get some support lol.

 

I think you need to have someone scan your ecu/chip before anything else, and find out if the cel is on and what the codes are for. it's highly possible there are multiple issues that need repair before anything o2 should be looked into

 

I plan on having it tuned soon. Yes, after I fix CEL light and the issues it's hiding. But I KNOW I can fix whatever issues CEL tells me about. It's just I was pretty sure it was 100% impossible to get the o2 sensor back after being chopped from harness (which i really need, i live n texas) So figured I'd address it first. But anyways here's the idea I have so far. Let me know if it looks right.

 

Good start, good looking research. I can't verify if the information is correct, or I'm not going to look to hard to do so right now. But I did want to chime in and say, don't buy a standard o2 sensor, buy a wideband right from the start. I know for a fact the PLX wideband also has a narrow band output that you can feed into the ECU so you can have some factory like compensation. But you will do yourself and your tuner a favor if you already have a wideband on the car.

 

I'll do some research on wideband/narrow band. But that sounds like a great idea. Thanks bro.