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ECMlink AEM wideband not reading in ecmlink

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19gsx91

10+ Year Contributor
1,199
294
Apr 20, 2011
Walworth, New_York
Forgive me for skipping the paste table but this does not apply to the mechanical health of my car...

I have spent 4 hours now trying to get my AEM UEGO 30-4100 (purchased last year, been installed and working fine as a standalone gauge) to read in ECMlink, I followed instructions, searched and searched again...

Here is where I am at. the WHITE wire for the AEM gauge is connected to ECU input #4 as per all the suggestions, I am simulating narrowband in ECM link. my WB 02 sensor is in place of my stock o2 sensor. (This is reflected in my ECMlink input settings, as front o2, simulate WB)

I have tried every individual AEM WB setting and the linear setting per ECMwiki, whenever I start the car and try to run a log it will NOT read an AFR from a gauge, No matter what I set it to the displayed value shows default and will not change.

The only thing I am wondering is my ground and power is pulled off the fuseblock, not the ECU, Could this be the issue?

Please tell me I am missing something very simple.

Thanks for any ideas/suggestions ahead of time.
 
I have 1g so from the research I've done... I am limited to running it in the stock front o2 location and running a NB02 simulation, as 1g cars do not have a factory rear o2 sensor, I wish I could keep my front o2 (I drove it to work today and I am not happy with the way it acts.. at all) I took some pictures of where I tapped in, I am starting to suspect that I might of cut the wrong wire... So we'll see. If anyone can tell me that I am either correct, Or incorrect and give me a visual as to which one I will need to access.
 

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Do you mean, you have tried selecting all the available types of AEM gauge ex: R1, eugo, ect..

Also I had a similar problem, why back turned out I wired in blue into pin 72 instead of White.

Yes I have tried every individual one and have come back with zero success on any of them, even taking gst-turbos advice and changing the values. The obvious answer seems to be I tapped the wrong wire but.. you guys will let me know shortly I hope.
 
I have confirmed 100% that I am wired in correctly, I also rewired it from the WB to the ECU to ensure it had a good connection.. and still nothing. Anyone Have any ideas at all?
 
are you sure the gauge is set to P0 in that little tiny screw hole on the rear of the gauge ?
 
are you sure the gauge is set to P0 in that little tiny screw hole on the rear of the gauge ?

Positive. I just went out and double checked. I was actually looking into whether or not it was supposed to be set to that, I haven't come up with any solutions as to why I'm having this issue, needless to say I am getting increasingly frustrated. I can try to figure out how to post a log but I don't think that will do any good. I followed gofers advice exactly on a thread of how to set it up and I have no change to my situation.
 
how about unpin it, apply power, and multimeter-test the wire to see if any voltage is coming out that way ? maybe its that one in a million faulty products off the assembly line
 
I'm honestly thinking this is my own doing, I gave up on logging my wideband and put everything back to the way it was, wired in some spade connectors so I could re-connect the front o2 sensor to my ECU and it isn't reading my front o2 at all (In ECMlink just reads a constant .04v, also none of my fuel trims are logging as a result of the cars inability to enter closed loop). So obviously something is wrong and I believe its in one of the connections I have made.

Until I have time to tear it apart again and rewire it properly and test with a multi meter I am going to chalk it up to my amateur attempts at doing electrical work.

Thanks for your responses, I will keep you posted if I get everything working.
 
I'm honestly thinking this is my own doing, I gave up on logging my wideband and put everything back to the way it was, wired in some spade connectors so I could re-connect the front o2 sensor to my ECU and it isn't reading my front o2 at all (In ECMlink just reads a constant .04v, also none of my fuel trims are logging as a result of the cars inability to enter closed loop). So obviously something is wrong and I believe its in one of the connections I have made.

Until I have time to tear it apart again and rewire it properly and test with a multi meter I am going to chalk it up to my amateur attempts at doing electrical work.

Thanks for your responses, I will keep you posted if I get everything working.
Make sure the wire that reads the signal for the wide band is the only wire you have connected to the stock wire that goes to the O2 pin . I cut out the wire that lead to the sensor. for some reason the it was keeping my plx wide and from working. Maybe causing a short or something but once removed the wide and started working and logging
 
I'll double check, I'm convinced it's something simple, at first my concern was either I didn't enter it right into ECMlink (even though I followed gofers instructions) or I tapped into the wrong PIN, both of those are eliminated so now I'm pretty sure it's just user error, the front o2 not reading is getting frustrating because I'm running a lot leaner then I'd like to be (15.3-16.2) at cruise in certain RPMs even though AFRest says its dead on.. I really miss closed loop operation. I'll be doing a compression test shortly and posting a log to get some advice, but that will not be until this is sorted out.
 
UPDATE - I have not had a lot of time lately to mess with this but last night I did get the pin out of the plug, hooked up a bullet connector and used heat shrink tubing. Hooked it up to the stock o2 sensor wire (have a regular o2 sensor in the front location, my WB is currently located downstream) and now it is reading and I have regained closed loop function.

I will be removing the front o2 tonight and hooking a bullet connector to the WB signal wire and attempting to log in ECMlink. I will update and let you know the progress, but so far it seems it was a bad connection due to the guy that installed it. (that'd be.... me)
 
Kind of reviving this from the dead as I have finally resolved MOST of my issues with my wideband, It did end up being a bad wiring job, Then I couldn't get my AFRs to match in link, THAT turned out to be a bad sensor AND a bad ground, so before you guys start blaming the gauge, might want to check the basics, I did the whole "clean air calibration" and "place in a gas soaked rag" and got 4 different readings, each one lower then the last, they all went full rich according to the wideband GAUGE but in the raw voltage on ECMlink it told the whole story.

I got a new sensor for my UEGO and fixed the ground and now my AEM gauge is reading as it should and logging in ECMlink.
 
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