Green89IROC305

The title says it all.

Is there any way to reconfigure the MAF Burn Off feedback signal into a 5v reference signal for the 6e adx? I would like to find a way to get my wideband as an input signal to the ecm for TunerPro RT to log.

Thoughts or other approaches for this would be appreciated.

I have an 87 ecm with an 6e definitions file.

Thanks!

heat seeker

iTrader: (5)

So are you just wanting a WB reading thru TunerPro?

Green89IROC305

Yep that is what I want. I just do not want to disable the o2 sensor to do it. If there is a cheap and effective way to do it I would be interested. I am trying to tune this with TunedPerformance and no matter what we do it's always too rich or lean during various conditions.

heat seeker

iTrader: (5)

Yep, there's a way. You will have to have a WB O2 sensor & gauge for this to work. You can tap into the D8 pin on your ECM for 0-5v reverence, connect it to your WB data output signal.

Then you have to add the command to your ADX file. You'll need the proper XDF file to display on your laptop. It's been a long time since I've done it.

I have both files if you need them.

Green89IROC305

I have both the gauge and the wideband. I have the adx and xdf that work together. Is there a special modification to your xdf for displaying this readout?

heat seeker

iTrader: (5)

Yes, the XDF has to be modified, or just use one with the WB conversion values already created.

PM your email and I'll send you the 6E WB XDF & ADX file.

Green89IROC305

Than yes I would need the XDF if you would be willing to send it or host it somewhere. I assume the 6e adx I have will suffice just have to add the data point?

Also I am trying to track down what the D8 pin is used for on the ecm. I cannot find it in my GM Electric Diagnosis shop manual. I looked at my ECM and D8 is either a purple wire or empty. It's in an odd spot to be sure of which wire I am looking at. I do see pin 7 in the manual I have is a purple wire and goes to the 02 sensor.

Can you provide a little more of the specifics for this?

I appreciate your help.

heat seeker

iTrader: (5)

The D8 pin the one I used on my 89 165 ECM and It was purple. I think it's either empty or the converted O2 port, and the XFD file recognizes that port. I have the thread about it saved at home, I can explain in more detail this evening. Just PM me your email for the files.

No prob!

Green89IROC305

Great! Look forward to hearing from you. Also sent you my email.

heat seeker

iTrader: (5)

Well I couldn't find the info I had saved. However, you have to use the D8 pin out of your ECM to your WB. The 6E WB XDF file I have is configured to read that port.

As long as your WB reads 18:1 - 8:1, the file I sent will work fine. I use an Autometer 4370 analog gauge. I modified that ADX file to match my gauge.

If your WB reads a different range you'll have to re-configure the tables in the ADX file to match your gauge. Or use another definition file.

Hope this helps.

Green89IROC305

Got it thanks for the tip.

Looks like my sensor reads 8.5 @ 0.50v and 18 @ 4.5v(below 0.5 sensor is not ready and above 4.5 is sensor error according to the documentation of the gauge package). So I think your equation should work. Otherwise I found a guide on moates that shows how to get a baseline, and ULTM8Z got me a way to use a TPS to determine the proper equation if necessary.

Appreciate all the help.

Tuned Performance

iTrader: (92)

Green89IROC305

Another couple useful links to build here.
https://www.thirdgen.org/forums/diy-...2-logging.html

http://support.moates.net/logging-a-...h-tunerpro-rt/

The above url from Moates will tell you how to come up with the equation for whatever wideband you happen to be using. Combining that with the above information will get you where you need to go.
A quick lead, pin D8's ADC is about 255(8-bit)

Thanks Heat Seeker, ULTM8Z, TunedPerformance and TGO

heat seeker

iTrader: (5)

Hey man. Mail order tunes are tough to get down with these cams. Cold start issues, and wide open pulls, were the hardest thing to tune. Also, I only run in open loop.

You would be better off using a similar base tune, and modifying it yourself.

What size injectors?

HSRTPI

thanks, the second base tune i ran was good at idle and startup. car will run ok up to 2500 then stalls out. I have been modifying
it myself following thirdgen forums but with negative results. 42lb injectors now with 40lb fuel pressure. raised the single and double fire fi size from factory 22.51 up to
40lbs/hr as advised and engine started running terrible. Reset it back to 22.51 and engine will start and idle again... crazy. disabled closed loop by raising temp setting and
also got a worse startup and idle. bin: