Bluecat

I don't know if it will help anyone, but I've been doing this for a while, but a different way. I've been running my wideband into the computer via the rear o2 plugs. Its not a direct wire up, but at the time I didn't think about finding a 0-5V analog input that was not needed (like the EGR or A/C temp). The regular 02 reads via a 0-1V analog input. I just took 2 resistors and made a voltage divider so that 5V = 1V. My wideband is linear 0V = 10AFR / 5V = 20AFR. So when logged through the divider its 0V = 10AFR / .5V = 15 AFR / and 1V = 20AFR, (so on and so forth). You can do it in your head by just logging the volage. .352 volts = 13.52 AFR. It makes it really easy to put it on another car because I used the end off of an old stock O2 and it just plugs in to any of the o2 connectors. Plus I get power and ground from the same plug which makes my wide band stand alone via the o2 harness.

I don't know if anyone has had trouble with voltage float, but using this setup with the o2's original independant signal ground (Signal Lo) insurses that the voltage you send to the computer is the exact same voltage the PCM sees.

I have my wide band on several cars and trucks a week tunning and have never had a problem. I even have a different o2 plug to use it on LT1 cars in the same manner plus a single wire connector for loggin the wide band on old old gm stuff since even the old TBI trucks computers will tell you o2 voltage via the ALDL.

MrDude_1

iTrader: (4)

thats pretty cool.
i thought about using the rear O2s as inputs, but i was bugged by the fact that its a 1v input, and while i could set my LC1s output range to meet that, i felt like i was losing resolution.

im glad to hear its working out fine.. i was curious about it, but i didnt try it.

are you using the HPtuner histograms and such with it?

Bad Habit Bird

iTrader: (12)

This sounds like something I would like. With a setup like this could you get away with just purchasing ONLY the WB sensor? I think doing that would save quite a bit of money.

Bluecat

No, but I don't see any reason why you couldn't. I wrote my own stuff to parse a HPtuners log file and spit out the VE percent error. That was back in the v1.7 time frame before the histograms were so configurable. I just never quit using it.

Bluecat

Not quite that cheap. You still need electronics to read the WB and spit out the 0-5V signal. Check out PLX's low end unit. Its about as low cost as they come and would work really well with any of the setups described in this post.

LS1 Sounds

iTrader: (11)

This was a bug in one of the early 2.x versions where it wouldn't recognize dotNet 2+, and has since been fixed. Download and install the latest version for a lot of nice new features!

realslow94z28

iTrader: (6)

ttt. thanks travis!

98Z28CobraKiller

iTrader: (17)

I just wanted to add that in order to get the AFR Error % histo to work, I had to also add the PID for the AFR Commanded High Res. I guess that is what represents the sen.121. III did mine thru the EGR and it works like a charm.

conan008

hi i dont use a maf any more could i use that for a conection for my lm1

RedWS6 00

I got this going a while back no wanting to buy the EIO I used the EGR input.
Write up is on here:- http://www.hptuners.com/forum/showth...t=Wideband+EGR

Red99TA

iTrader: (11)

This is what I'm doing too but I haven't figured out how to correctly do the custom PID in HPTuners. Right now I'm just logging the EGR volts and then I copy results into a spreadsheet and convert the voltages to AFR readings myself...kind of a pain but it works and no EIO charge.

RedWS6 00

Thats a good start, even better that you know the formula in Excel to change volts to WB reading, we can use that formula in HP tuners.

In the scanner software, go to Table Display right click on a blank cell, click on Insert. Go to 'User defined' then 'Configure User Defined'. Find a blank entry. I named my Wideband(EGR)
In the function box I got ([PID.2811]/.53)+9.8)
PID.2811 is the EGR Voltage in my case, not sure if its the same on all cars/trucks.
The forumula convert the volts form my AEM wideband guage to an Air Fuel Ratio.

So in the configure 'User Defined Box' we have
Name : Wideband (EGR)
Abbv: WBAFR
Sensor: <left blank>
Units: :1

Function is as above.

Now you should have a Wideband PID

Magnus

iTrader: (4)

Set the sensor to be AFR, and everything in the scanner will magically work again.

Red99TA

iTrader: (11)

Thanks for the help RedWS6 00, I'll give it a shot this weekend.

CamTom12

iTrader: (1)

I think I might be the first and only '02 Fbody logging my W/B through my EGR...

TAQuickness

iTrader: (28)

I didn't bother to read the whole thread, but did you add the wiring the PCM harnes or what?

CamTom12

iTrader: (1)

Yeah, I pulled a wire out of the red harness to the PCM that used to run to the AIR system and added it to the blue harness to the PCM where EGR would have been in '99-'00. I did it that way to keep the 'mini-pin' Harness-to-PCM set-up without having to do any jerry-rigging. Works like a champ! (I didn't do a write up though. I figure anyone that's going to try this could probably figure it out since I'm no rocket-scientist myself, haha)

RedWS6 00

I think I was the first '00 Fbody
Felt like a pioneer, lol, posted my progress on HPTuners website some time ago, letting people know they dont have to buy the EIO interfae to log WB.

BIRDONNOS

iTrader: (3)

digging this from the grave anyone know which wire to use for the a/c on a 1998 transam? i took my a/c off so want to do this with my setup.

BIRDONNOS

iTrader: (3)

found it gray wire on the blue connector #66 for you other 98 guys...........