O2 Simulator - Know how to make one?

[Texashorsepower]

I have seen a few personal websites that showed in detail the drawings and parts needed to make an O2 simulator your self but I never saved them.
Have any of you guys come across the same sites? Better yet - Do you have the address??!!! =-))
I'm going to make one and it's not that hard, I remember all the components were regular Radio Shack electronic items... I just need the diagram! =-))

Any help with finding a site like this will be greatly appreciated!!!

Thanks Guys! :D



THP

[Sparky2263]

I would LOVE to see a schematic for one of those!

[Texashorsepower]

Ask and you shall receive! Merry Christmas Sparky!!

http://www.mkiv.com/techarticles/oxygen_sensor_simulator/


I don't know enough about it, but I wonder if the signal response is standard with all makes (import/domestic) and if this would work for us -

Either way I think I'm game to try it since I'm starting to get the inefficient catalytic performance code. It could be either the cat or the post sensor but I think it's the cat since I can hear it rattle like crazy. This is the second GM cat that has done this to me in this truck.
Oh well, time to punch it all out and wire in the O2 Sim. :D



THP

[Texashorsepower]

Kinda funny -

I just answered my own post -

HAhahahahaha





THP

[Sparky2263]

That is too cool. Thanks!

[s10xtremist]

It says it can be built with Radio Shack parts for $15 to $20. I bought this (http://www.o2sensorsimulator.com/?OVRAW=o2%20sensor%20simulator&OVKEY=o2%20sensor%20simulator&OVMTC=standard) one and I've had no problems at all. Unless you just want to build your own I don't think it's worth the trouble.

[Sparky2263]

No kidding. For $25, I'll go that route.

[jjwalker]

Damn, I took a year in electronics befoe automotive...I should make these thign and sell them since they ae not copyrighted as i can tell!

****, if anyone wants one built PM me and you got it!

[Texashorsepower]

Do you know if the heater portion of the sensor has to have the resistor wired in or do our computors not look for this?

[rat]

You probably do have to also simulate the heater circuit with a resistor. There is a code for that o2's heater circuit, P0147.

Another option is to have the ecm programed without the code. I know i can do this really cheap if anyone with a '98-'00 4.3 wants/needs this or any other code removed. A certain aftermarket tuner's timing tables can also be implemented. And tire size, and trans shift firmness can also be changed. Other years for me would be more expensive though, also the vehicle would have to be down for a few days waiting for the mail.

[Sparky2263]

Do you know if the heater portion of the sensor has to have the resistor wired in or do our computors not look for this?

I would leave the heater wired up to the existing O2 sensor. It has a sizeable draw (2 amps or so) and the computer is looking for the completed circuit. Just take the sensing signal and hook it to the simulator.

[s10xtremist]

Yeah, it says in the instructions to leave the heater circuit intact and the simulator connects to the sensing circuit and a ground. It is basically a simulator for OB2 systems in general and the instructions reflect that. I had to "guess" which wire I was to cut/tap into and which one to leave alone. If you have a wiring diagram, this step would be a little easier. I took a lucky guess and my light hasn't been on since. If you do cut the wrong wire, just solder and heat shrink the repair. The hardest part about it is the minimum slack in the wire for working with your wire strippers. If you have a wiring diagram, this step would be a little easier. I took a lucky guess and my light hasn't been on since.