Wideband through EGR

[MikeOD]

What did you have to do to get it to work?

I looked here http://www.aemelectronics.com/Images...%2030-4100.pdf ...page 3 shows the wiring diagram for the unit...based on how they're grounding it...I'd say you might want to connect the reference ground pin from the PCM (pin 41) to the same chassis ground that you connected the AEM unit to...which may correct the 0.2-0.4 difference...right now there's probably some resistance between wherever the PCM is grounded and wherever your AEM controller is grounded...making the 2 ground planes different...which will cause some error in your readings.

Further down in that manual, on page 5, they show a table of voltage versus AFR...you showed above that you were playing with 2 versions of your equation...one with 10 and one with 9.8...looks like 0 volts on that controller is 10.0:1 on gasoline...at 4.99 volts (the last given value on the table) the AFR is 19.98...given those numbers, you have a known voltage range of 4.99, and a known AFR range of 9.98...your equation should be ([PID.2811]/(4.99/9.98))+10. That simplifies to ([PID.2811]/.5)+10...so make sure thats the version you have in there.

After that (making sure the equation is correct and allowing the PCM to reference the same ground plane as the AEM), if you still find that it's off a little bit...I'd say take the car out of closed loop to allow yourself to try to stabilize the AFR at a bunch of different points (use the VCM controls in the scanner) just to make sure it's the same error across the board...add fuel until the wideband says 12.0 and see what your software says...then 12.5 then 13.0 then 13.5 then 14.0 and so on...if you do it at idle, you're not going to hurt it going lean either...I'd go all the way up to 16.5 or even 17.0 if it'll idle up there...depending on your engine setup, you may need to hold the engine up at 2000 RPM or something to get stable consistent AFR readings...but even then...holding it at 2000 RPM and no load at all (just in neutral)...you won't be able to hurt it from being lean momentarily while you make notes on the error.

Once you're satisfied that the error is the same across the board...add the error to the 10 in your equation and you should be all set.

[PAT WS6]

i got it pretty close using this ([PID.2811]/.5)+9.8 but it still seems to be a few off.

[PAT WS6]

i will try the new function you suggested and see if that make it better, thanks again for your patience

[PAT WS6]

I am having trouble setting up the AFR Err % for the pid im using this function
*100(([PID.2810]/.5+9.8)-[SENS.121])/[SENS.121]

And then for the histogram function im using this
[SENS.90]>2%

i cant get either to work at all

also what AFR should i see driving around, and then entering WOT & building boost? i know at WOT im seeing low 11s i would like to keep it on the safe side with 93 octane only im running 12* in this heat

[PAT WS6]

Further down in that manual, on page 5, they show a table of voltage versus AFR...you showed above that you were playing with 2 versions of your equation...one with 10 and one with 9.8...looks like 0 volts on that controller is 10.0:1 on gasoline...at 4.99 volts (the last given value on the table) the AFR is 19.98...given those numbers, you have a known voltage range of 4.99, and a known AFR range of 9.98...your equation should be ([PID.2811]/(4.99/9.98))+10. That simplifies to ([PID.2811]/.5)+10...so make sure thats the version you have in there.

I messed with it a little and the best and closest seems to be this
([PID.2811]/.5)+9.8

[MMGT1]

Got the BETA version and now none of my configs for WB through EGR will work. Did HP make it so we cant do this now?

If someone would look mine over to see why they wont work I'd really appreciate it guys. Ive been trying for 3 hours to make it work here and need this tonight if anyone is on. Here is my config.

Attachment 30062

You guys see where Ive gone wrong by chance?

Ok, got it working... YAY!! LOL Used HP's built in Error Pid and all is good guys! Went back to the first page and found a post that pointed me in the direction of the Error Pid that is now built in, wicked guys, and thanks for updating that first page guys.....

[PAT WS6]

my aem wideband is still showing about .4 off from what my gauge is reading. any one know how close its suppose to be?

[MMGT1]

Adjust your formula's ending value to make HP read what your WB is reading. You want your digital reading to match what HP is reading. Trust what the gauge reads and make them match bud., within .1 should be the goal

[PAT WS6]

ive tried changing it to 9.7 9.8 n 10 and still no luck?

[MMGT1]

Its staying at a .4 error no matter what you change it to?

[Iam Broke]

Hi all,

I just wanted to say the info in this thread is great. Took a while to decipher it, but I'm getting there.

In summary, I got the WB from my Auto Meter WB 0-4v output working tonight.

+ Signal connected to Blue ECU connector Pin 55.
- Signal connected to Blue ECU connector Pin 41.

Enabled EGR in my tune on the general tab and set the WB range up for .8 to 1.2 Lambda or 9.6 to 14.4 AFR as I am running 47% Ethanol currently for a stoich of 12.01

Custom PID for the 0-4v output to AFR is (([PID.2811] /(4/4.8)) +9.6

4 v span on the WB, 14.4 - 9.6 = 4.8 for the range.

Going to set up the histos for AFR error tomorrow in the scanner.

Thank you for all the good info provided.

[Iam Broke]

Well, it took some doing to get all the histos set up, but I drove about 150 miles yesterday in 6 or 7 trips. lol. First tuning VE, then MAF. Once again, thanks to all in this thread. The info was very valuable to me.

The Scanner and my WB match perfectly.

[PAT WS6]

glad you got it figured out, im still hunting the issue while my car is down.

I cant get my hptuners and wideband to match. its still around .3 off. If i alter the last value of the function it still wont get close to matching?

[Iam Broke]

Make sure you have enough parenthesis in your function so that it calculates correctly. Post what you have in the custom PID.

[PAT WS6]

([PID.2811]/.5)+10

it seems to be alot more accurate that i switched it from 9.8>10

the only issue is that it jumps around so quickly i cant get a good reading to be exact

[Iam Broke]

It will still work ok in your histograms though. Once you disable the MAF, STFT's and LTFT's to tune the VE it'll settle down some. If the ECU is still trying to control it it will bounce all over the place until you get it dialed in.

I kept the wideband sensor wiring away from any sparkplug wires to help eliminate any electrical noise also.

I used the tuning guide found on this page to get started... I'm sure there are many others around.

http://ls1tuningguide.com/tuninghelpfiles.php

[PAT WS6]

anyone have anymore info on the AFR % Error? i cant seem to get mine to read.. my function reads this for my aem wideband....

*100(([PID.2810]/.5+9.8)-[SENS.121])/[SENS.121]

my wideband reads this

([PID.2811]/.5)+10

[2005vetteTT]

anyone have anymore info on the AFR % Error? i cant seem to get mine to read.. my function reads this for my aem wideband....

*100(([PID.2810]/.5+9.8)-[SENS.121])/[SENS.121]

my wideband reads this

([PID.2811]/.5)+10

If your current formula to find the wideband AFR is ([PID.2811]/.5)+10 then use:

100*((([PID.2811]/.5)+10)-[SENS.121])/[SENS.121]

[Freeway99]

Another resurrection, I was wondering if everyone is using the 2.23 beta because I can't get the scanner to recognize my custom PID's. Any help would be appreciated.

[Iam Broke]

I have been using the 2.23 beta since it was first released. Last time I updated was ~May though. You might have to rebuild your custom PID's.