Datalogging and Calibrating an AEM Wideband with S300

diSTiNCt · Post by **diSTiNCt** » Wed Nov 18, 2009 9:22 am

Hi,

I have been helping a good friend of mine and we have been have some issues getting the AEM Wideband to calibrate with the S300 unit.

The S300 unit was professionally installed into a p28 by Locash Racing in Phoenix, Az. We are using the ELD to datalog. We have removed R136 and R138 from the ecu.

Our main problem is that while calibrating the unit, the AFR readings in Hondata wont stabilize. We simply removed the wideband sensor from the gauge so that the reading on the wideband gauge is 14.8 and then tried to get a voltage offset to get the S300 to display 14.8 but every offset we tried from -3.0 to 3.0 never stabilized.

So my question is, how do I get the AFR readings in Hondata to stabilize? Additionally, under any display templates, the AFR readings don't change even while datalogging (however they do change in the datalogging table).

THX

Post by **Spunkster** » Wed Nov 18, 2009 1:00 pm

Where do you have it connected for power and ground?

BLKACK1 · Post by **BLKACK1** » Wed Nov 18, 2009 2:07 pm

I was just about to post a similar question about my aem uego and smagaer, all thought ive got my smanager to read about the same as the guage, it hardly changes while driving the car around

diSTiNCt · Post by **diSTiNCt** » Wed Nov 18, 2009 3:06 pm

Spunkster wrote:Where do you have it connected for power and ground?

I have power coming from ignition power. It shares the power with the oil and boost gauge.
The ground is attached directly to the chassis of the car (right around the fuse box), we sanded down the paint to make sure it made contact with metal.
It is a 93 Honda Civic.

Post by **Spunkster** » Wed Nov 18, 2009 3:47 pm

but where exactly are you taping the power from?

diSTiNCt · Post by **diSTiNCt** » Wed Nov 18, 2009 3:51 pm

Spunkster wrote:but where exactly are you taping the power from?

Power is tapped from the white in the ignition harness.

Post by **Spunkster** » Wed Nov 18, 2009 4:35 pm

Don't tap it from wires. Go directly to the fuse box. There spots there to hook spade connectors that are switched power.

diSTiNCt · Post by **diSTiNCt** » Wed Nov 18, 2009 4:53 pm

Spunkster wrote:Don't tap it from wires. Go directly to the fuse box. There spots there to hook spade connectors that are switched power.

Is there any specific one that you would recommend on this 1993 Honda Civic Si?

Post by **Spunkster** » Wed Nov 18, 2009 5:36 pm

one of the switched power points on the fuse box.

BLKACK1 · Post by **BLKACK1** » Thu Nov 19, 2009 9:42 am

diSTiNCt wrote:
Spunkster wrote:Don't tap it from wires. Go directly to the fuse box. There spots there to hook spade connectors that are switched power.
Is there any specific one that you would recommend on this 1993 Honda Civic Si?

your going to have to refer to your helms or service manual for that

diSTiNCt · Post by **diSTiNCt** » Mon Nov 23, 2009 7:39 pm

so tomorrow, my buddy and I will try to figure all this out.

In the following picture, will the slot where the yellow wire is installed work for a power source for the wideband?

BLKACK1 · Post by **BLKACK1** » Mon Nov 23, 2009 11:03 pm

go 1 to the left(option C)

http://www.google.com/imgres?imgurl=htt ... CBEQ9QEwBA

fly_n · Post by **fly_n** » Mon Nov 23, 2009 11:22 pm

diSTiNCt wrote:so tomorrow, my buddy and I will try to figure all this out.

In the following picture, will the slot where the yellow wire is installed work for a power source for the wideband?

Just put a multimeter or similar on each one & see which one turns on when u turn the key to ignition.

Also be aware that the one u are after is only protected by a 40-50 A fuse in the engine bay,so if u dont want to use 40-50A wire to hook up your wideband(which u probably wont), then insert a fuse small enough to protect the size of the wire u will be using directly after the fuse box.

diSTiNCt · Post by **diSTiNCt** » Tue Nov 24, 2009 8:38 pm

Alright, thanks guys. My buddy had some things to do so we weren't able to work on his car. Hopefully soon, I can post that the problem is solved.