Trouble with AEM 30-0300 wideband gauge and BE

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alollich
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Posts: 17
Joined: Thu Jul 21, 2016 10:11 am

Trouble with AEM 30-0300 wideband gauge and BE

Post by alollich » Fri Apr 26, 2019 2:48 pm

Hello,

I am having trouble getting correct AFR readings with my AEM in binary editor. I am able to see and log the wideband in BE, however the readings differ approximately and consistently 1.5 points from what the gauge itself reads and what binary editor shows (example: the gauge reads 14.5, BE reads 16). From what i have read on other posts i expected that the transfer function would have to be adjusted. I started with the transfer provided by AEM which is the x column 5, 4.5, 3, .5, and 0 the y column 1.23, 1.23, .99, .58, and .58. That transfer gets me the 1.5 point difference. Here is the reason for my question...I can change the y column in the configure channel 1 to any number I like no matter how absurd the number is (example change 1.23 to 7 or .001 it has no effect on the reading shown in BE. I tried multiple variations of transfer functions and it has no effect. What am I doing wrong?

I have the white 5 volt analog wire connected at the EGR plug (disconnected and EGR is disabled) not at the pin on the computer.

A3M processor 1993 mustang
AEM 30-0300 gauge with the LSU4.9 sensor
quarterhorse
straight pump gas

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Vortech347
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Posts: 297
Joined: Tue Sep 29, 2009 11:04 pm

Re: Trouble with AEM 30-0300 wideband gauge and BE

Post by Vortech347 » Fri Apr 26, 2019 4:07 pm

I've tried chasing mine down to match the gauge for a full day and finally just gave up on getting it to match perfect.

What would be bad ass is if the gauge had a mode that would send the signal steady for each point of AF. Then putting in the ACTUAL transfer function would be cake. I think the big issue is that it's going through factory wiring. I tried mine through some of the wiring then right at the ECU itself. Didn't change much.
Matt
90 GT, 347, Vortech Si-trim (11psi), Edelbrock 6037 heads, Super Victor 8.2 EFI Ported, 80MM Pmas, 60lb EV14 Bosch Gen 4 Injectors, KB BAP, B31 Cam, T56. Tweecer RT, A9L. Software: EA/BE. 550rwhp & 513rwtq.
2003 Sonic Blue 03' Cobra 497rwhp 481tq, Pro Racer Pack
2013 Taurus SHO Performance Pack.

alollich
Gear Head
Posts: 17
Joined: Thu Jul 21, 2016 10:11 am

Re: Trouble with AEM 30-0300 wideband gauge and BE

Post by alollich » Sat Apr 27, 2019 4:13 pm

Its been frustrating for sure. The thing I don't understand the most is why are none of the edits to the transfer function having any impact on the read out in BE? No matter what I change I still have the 1.5 point difference (14.5 on the gauge 16 in BE). I would expect changing the y column would have some impact on what BE displays from the gauge.

alollich
Gear Head
Posts: 17
Joined: Thu Jul 21, 2016 10:11 am

Re: Trouble with AEM 30-0300 wideband gauge and BE

Post by alollich » Thu May 02, 2019 6:03 pm

I figured out the majority of my problem. I did not have the transfer function correct on the datalog tab. Once set to the correct AEM supplied numbers the gauge and BE read very similar. Close enough for what I am doing that I don't believe the very small variance will make a difference.

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Vortech347
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Joined: Tue Sep 29, 2009 11:04 pm

Re: Trouble with AEM 30-0300 wideband gauge and BE

Post by Vortech347 » Thu May 16, 2019 3:20 pm

I tried using AEM's transfer functions and they're so far off. Glad that worked out for you.
Matt
90 GT, 347, Vortech Si-trim (11psi), Edelbrock 6037 heads, Super Victor 8.2 EFI Ported, 80MM Pmas, 60lb EV14 Bosch Gen 4 Injectors, KB BAP, B31 Cam, T56. Tweecer RT, A9L. Software: EA/BE. 550rwhp & 513rwtq.
2003 Sonic Blue 03' Cobra 497rwhp 481tq, Pro Racer Pack
2013 Taurus SHO Performance Pack.

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