I bought the car from someone and it looks like they just put the sensor in and didn't plug it into anything, however I didn't realize this until I bought another sensor and realized there is no connector on the harness. There are 3 connectors, each with 2 wires while the o2 connector has 4 this is the harness and the three connectos

the one one the bottom looks like it might have 3 wires, but there are only 2 coming out of the back

this is the connector to the o2 sensor and as you can see, does not match any of the others.



I looked everywhere I could and cannot find a connector that looks like it would fit.

I don't know if the engine or wire harness was swapped out, I am just really confused as to how there is not a connector for the sensor.

 

Insufficient data.
What is the history of the car?

The grey connectors appear to be those for the AT solenoids, but it appears the car is now an MT.
Hitachi distributor(internal coil) is found on EX F22B1 VTEC engines, but the exhaust manifold indicates an F22B2 non VTEC(DX/LX) engine.

Verify what sub model the car is, DX/LX or EX.
Verify what engine is in the car, look above the front engine mount, there should be a casting/stamping "F22B#' # will be a '1' or '2'.
Look under the car, before the catalyst there will be a 3" section of pipe that bolts to the down pipe from the exhaust manifold and catalyst. On a 'B2' engine this will just be a straight pipe, on the 'B1' engine this will house the primary O2S.

 

I asked the kid I bought the car from and he said that was how he got it and didn't know any other history of the car.

On the back of the car it says "Accord LX"

The engine is an F22B1 and says "VTEC" on top

The car is manual transmission.

I can't get under the car right now, but as far as I can tell, the downstream o2 sensor is fine. There was only one o2 code.
Unless there was an engine swap (you said the LX doesn't have a VTEC) and this obd2 harness only takes one sensor, the downstream one, and someone just stuck the sensor in upstream spot after the swap, just so there wasn't a hole? Is this a possibility? I am just trying to come up with any explanation. Also the car has over 280,000 miles and drives very smooth (other than burning super rich from the o2) so an engine swap is a possibility.

 

You have a bit of a hodge-podge of parts.

LX is a B2 non-VTEC car.
EX is B1 VTEC, engine was installed erroneously or someone tried to do a B1 swap and did not complete the swap properly.
Part of the increased power comes from the EX style exhaust manifold with better flow than the LX single downpipe manifold(where the O2 is installed) which is currently on your car.

If it was originally an AT car the original gauge cluster may still be installed, if you can see 'P-R-N-D4-D3-2-1' in between the tach and speedo then the car was most likely originally an AT car.
Look for a modified wire harness under hood.
Attached to the VTEC cylinder head will be the VTEC solenoid(#11 in the attached diagram), it should have a short wire harness coming off it and should be plugged in to activate the solenoid for VTEC to function. If this is not connected the engine will have a very hard time revving past 3000rpm as the engine will be stuck on the 'primary' cam lobes and not the high-lift lobes. VTEC will activate ~2500-2700rpm.

You may also want to check under the carpet on the passenger foot well. That is where the PCM is located, check PCM is correct for your car/engine. Locate the part number it will have an alphanumeric code of five numbers, three letters, and three numbers such as '#####-***-###' this will help in understanding what the car has.

 

The primary O2 sensor harness connector (C127 - 4 Grey) should have been right next to Connector C122. The pictured harness connectors are for an automatic transmission; but, the O2 sensor connector should still have been there if the harness is for a 96- OBD-II.

 

I'm thinking OBDI B1 engine and harness 'swap' into this later OBDII B2 car.

 

Its beginning to look that way. I'm not really sure of what to do other than find the obd(I/II), find the pin out, and just run a new set of wires to the O2S. The engine actually runs better at higher RPM's and it smells like it burns very rich (also bad gas milage) So I need to figure this out.

Is it possible for me to find where the wires come out of the computer and either trace them or make new ones?

 

If you can take pictures of the engine bay and post that would help us help you.
When the car is turned to II(ON) all the warning lamps should come on, CEL should come on if it is not then it has either been disabled or burnt out.
If the OBDII harness is still installed there should be the OBDII diagnostic port located behind the ash tray.
Pull the carpet back on the passenger footwell pull off the protective plate and look at the ECU and record the part number and report back here for verification of what is running your engine.

Distributor harness, OBDI will be two small connectors, OBDII has a single large connector. Grey in color.
VTEC solenoid in the above posted pic, 94/95 uses sensor #13, it should have a harness connected to it. 96/97 looses the sensor and just has the bolt #14.

You will need to figure out which ECU is controlling the engine. Due to the difference in exhaust and O2S location the timing of the signal from the O2S is different between B2 and B1 engines.
Below is the exhaust piping for the EX, you may be able to use the EX mid pipe #7 with the LX exhaust to have a functional O2S. If the EX wiring harness was installed there will be a wire hanging down the back side of the engine, possibly on a metal stay under the intake manifold, that will be the harness for the O2S. Then a primary O2S(#28) can be installed. Harness on the O2S is different between B2 and B1.