So I installed the dual output 02sim yesterday evening. What a pain in the a$$ that was.
I did not want to destroy the factory wire harnesses to ECU, so I decided to use the wires after the plug instead. What kind of friggin' wire is used on those 02 sensors? Can't bend it, twist it, heat shrink it. Nothing!
Long story short. I unplugged the 02 to ECU plugs, removed the secondary 02 harnesses from the brackets, removed the first set of clips holding the 02 sensor wires in place and hung them down under the car for easy access. I got on my back under the car, cut the required wires, and crimped the 02 wires and 02sim wires together. I then wrapped all wires with electrical tape fed them back up to the brackets, reinstalled harnesses, plug the 02 sensor to ECU plugs back in and voila'. DONE!

Turned ignition on, checked that green 02sim light was blinking, it was (good), then reset ECU and got a big grin on my face.

Drove around all day today, and so far no SES has triggered.

 

sweet. i will be doing this later on today

 

the install would have been easy as hell if you spliced into the wires before the harness like the tutorials say too, they even mention how hard it is to work with the wires on the sensor

 

FTMFW.. Splicing those sensitive as.s wires also introduces some other problems also.

Electromechanical noise resulting in voltage spikes, causing CEL/SES/MIL issues.

 

Problem is I read where the 02 sims do eventually go bad. I do not want to have wires spliced into unreplaceable wire harnesses. Atleast this way, I can replace the sim if needed or buy new 02 sensors without having hacked up factory wires.

 

Crimping the wires should avoid any of these issues. I considered solder, but after messing with them, figured it would be a losing battle.

 

The sheilding around each wire helps with the noise more than anything else. i.e crimping/soldering/brazing.



It's not like you're hacking the holy hell out of the wire harness.

 

I doubt crimping the O2 sensor wires will hold them for very long, but I could be wrong. Just based on my experience trying to reconnect them after cutting them.

IMO, if you can figure out how to install the sim before the connectors, you can replace the sim very easily, so I don't understand why anyone thinks installing the sim before the connectors involves "hacking" anything.

Regardless, it works for you, so good job on the install.

 

yes, the o2 sensor wires are extremely tough...its like made out of steel!! just tryin to cut them with a big scisscor of mine was a big hassle...

but for some reason the wires before the sensor, they cut very easily...i think this is one of the reasons why most people do it before the sensor itself...and you're far from hackin up the wires if u ask me...!

 

Ok, maybe the word "hack" was not the right word to use, but I at all costs, will do everything I can possibly do to not cut into factory wire harnesses when the cuts are on a wire harness that is almost impossible to replace if something were to happen.

The 02 wires are easily replaceable if new 02 sensors are installed or even old ones are acquired if I decide to do it differently. Just a matter of preference. I could have cut before the harness, but did not.

Here is a picture of the installed sim for curious minds...

 

Used engine harnesses can be found for under 100$

So why the sims... do you have headers under those worn heat shields?

 

Secondary 02 sensor went bad. $30 for the sim -vs- $100 or more for the one sensor with possible second sensor going bad. Another $100+.

Went with the dual output sim and alleviated future issues with both.

 

simulator cheaper then new o2 sensors?

 

Sure seems that way.

 

The simulator is $25 + $5 (shipping). They have dual output or single output. 5.5 gen has 2 secondary 02 sensors, so I bought the dual output sim. It's same price as single, so why not.

www.o2sim.com

 

thats what i meant when i posted.

 

Threw me off with the '?' at the end of your post.

 

or you payed for an o2 sim more then the price of one o2? stop confuzing us...

 

I just don't get it why people opt to "hack" the main harness and install the sim on it where you can just as easily install it on the actual sensor wires after the connection to the main harness and it will work just as well... Have mine on for past 6 months like that with no issues and no worries about integrity of the main harness... But that's just me out-of-the-box

 

No he was saying that for the price of one normal o2 sensor = $100+, he got an o2 Sim for way less that does the job of both o2 sensors = Dual output.

 

Just wondering? What did you do about the heated o2 wire? I believe its the black one. The 4th wire on the sensors you are eliminating

 

You do not eliminate it. The ONLY wire that is actually completely disconnected from the sensor is the 02 sensor wire itself. This is now connected to the simulator. The (+)pos and (-)neg are spliced into, but still connected and the heater sensor wire is not touched. The 02 sensor still sends the heat signal to teh ECU.

 

If you splice into the O2 wires, you leave it intact, as mentioned above. If you splice before the connectors, you leave the O2s plugged in so that the ECU still records some resistance from the heater wires.

Some people were fooling around with resistors to simulate the heater circuit in order to completely remove the O2 sensors, but AFAIK, no one has been successful yet.

More info here:

http://forums.maxima.org/showthread.php?t=435399

 

i accidently disconnected the whole sensor, but i connected some resistors and fixed it. my cardomain has very nicely diagrammed instructions.

 

what kinda of resistors did you use? can you post a pic please

 

He used 10 W 15 Ohm resistors. Its on Page 4 of his homepage like he mentioned.

 

just got my o2 sim installed today. a simple install.

 

I understand, I have sim's myself but was just wondering how he did it because that's the only thing he didn't mention about the install.

I have a resistor and have had no problems. My O2's are sitting in my tool box