AEM Wideband O2 gauges

[911pcars]

Sal,
Did you mount the WB gauge housing to the A pillar or IP? If so, how?



On my 914-six, I used an Integra A pillar adapter and fabricated a mount using the existing trim screw. However, the A pillar profile is different on a 911.



Sherwood

[afterburn 549]

Looks awsome !

[scarceller]

Sherwood,

Nothing fancy, the gauge is in a pod and the pod has a tiny Velcro strip to the dash, that's it. I also saw them mounted to the windshield with suction cup pod.

I did not want to drill any holes and I like the location, it's in my face at all times.

Originally Posted by 911pcars

Sal,
Did you mount the WB gauge housing to the A pillar or IP? If so, how?

Sherwood

[911pcars]

Sal,
Thanks for the quick response. There's a 911 clamp-on pillar adapter on ebay and wondered how that works out. Velcro is good.

Sherwood

[puddy]

Hey guys, my CIS equiped car has a Halmeter narrow band AFR meter, do you know if I can just switch to the digital wideband AEM gauge and eliminate the Halmeter unit without any issues? I understand the wideband AEM gauge will use a new wideband O2 sensor, so can I just replace the old narrow band sensor with the new sensor?

Thanks!

[Lyle O]

Originally Posted by puddy

Hey guys, my CIS equiped car has a Halmeter narrow band AFR meter, do you know if I can just switch to the digital wideband AEM gauge and eliminate the Halmeter unit without any issues? I understand the wideband AEM gauge will use a new wideband O2 sensor, so can I just replace the old narrow band sensor with the new sensor?

Thanks!

I have a similar question with respect to my '87 Motronic car. Could I swap out the current narrow band sensor for the UEGO 4.9, hook the white wire to the Motronic box, but with the calibration set at 0-1v? Should the gauge still show good AFR #s? I'm trying to see if I can avoid drilling and welding another bung on my headers (I would have to do it on the passenger side bank). Sorry if this was already covered, but it wasn't clear for me. TIA.
Lyle.

[tmaull]

My understanding from Sal's other posts is that you can totally unplug the narrowband sensor and the car will run like RoW car. Please feel free to correct me on that point though.

[puddy]

If I understood Sal's previous posts correctly, I can remove the old O2 sensor, install the new WbO2 sensor and connect/splice the white wire from the old narrow band sensor's connector to the white wire coming from the gauge, set the gauge to the correct setting with the switch on the back, and Bobs yer uncle?

[911pcars]

Originally Posted by puddy

If I understood Sal's previous posts correctly, I can remove the old O2 sensor, install the new WbO2 sensor and connect/splice the white wire from the old narrow band sensor's connector to the white wire coming from the gauge, set the gauge to the correct setting with the switch on the back, and Bobs yer uncle?

What does the switch on the back do? What's the "correct" setting?

S

[tmaull]

Changes the output voltage range for the white wire coming from the gauge.

[scarceller]

Yep, you got it! Just put the switch in pos #4 and connect the white wire back to the signal wire that the old sensor had been on. In the 84-89 Carrera cars the O2 signal wire is found on Pin #24 of the DME connector. Or wire it back to the engine bay to the O2 harness that had been connected to the old factory O2 sensor.

Originally Posted by puddy

If I understood Sal's previous posts correctly, I can remove the old O2 sensor, install the new WbO2 sensor and connect/splice the white wire from the old narrow band sensor's connector to the white wire coming from the gauge, set the gauge to the correct setting with the switch on the back, and Bobs yer uncle?

[911pcars]

Originally Posted by scarceller

Yep, you got it! Just put the switch in pos #4 and connect the white wire back to the signal wire that the old sensor had been on. In the 84-89 Carrera cars the O2 signal wire is found on Pin #24 of the DME connector. Or wire it back to the engine bay to the O2 harness that had been connected to the old factory O2 sensor.

Sal,
Just to confirm.
Rewiring the AEM white sensor wire to the factory O2 harness connection and changing the switch setting (position 4) on the back of the gauge provides the correct 0-1V signals for proper DME operation.

... and the gauge still displays accurate A/F ratios throughout the wide band range. Have I got that right?

I asked someone at AEM (or a 3rd party salesman) awhile back and they said "no".

Thanks
Sherwood

[tmaull]

Sal,
A while back you said if the car didn't have a cat, it ran better without the O2 sensor plugged in. Did you mean leave the Narrowband O2 sensor in free air or would you recommend just not connecting the white wire at all?
-Tom

[scarceller]

If you do not have a cat then run it in open-loop, meaning no signal being feed back to the DME at all. If the mixture has been properly set and you have everything in working order these cars run best in open-loop just like the Euro 'Rest of World' cars run.

You can just disconnect (unplug) the stock sensor but better yet I'd unplug it and remove it from the exhaust stream.
To be clear, do not connect the white wire at all and do not run a stock sensor if you do not have a Cat.

Originally Posted by tmaull

Sal,
A while back you said if the car didn't have a cat, it ran better without the O2 sensor plugged in. Did you mean leave the Narrowband O2 sensor in free air or would you recommend just not connecting the white wire at all?
-Tom

[scarceller]

The docs are here
http://aemelectronics.com/files/instructions/30-4110%20Digital%20Wideband%20UEGO%20Gauge.pdf

Near the end it shows what each position of the switch does. In pos #4 the gauge's white wire emulates a standard narrow band. I also believe the display stays in AFR setting. Only Pos #2 changes the display to Lambda instead of AFR but I'm not 100% on this as the doc is a bit ambiguous about lambda display. Best to have someone that has the gauge move the switch to pos 4 to be sure the display remains in AFR mode.

Originally Posted by 911pcars

Sal,
Just to confirm.
Rewiring the AEM white sensor wire to the factory O2 harness connection and changing the switch setting (position 4) on the back of the gauge provides the correct 0-1V signals for proper DME operation.

... and the gauge still displays accurate A/F ratios throughout the wide band range. Have I got that right?

I asked someone at AEM (or a 3rd party salesman) awhile back and they said "no".

Thanks
Sherwood

[tmaull]

Thanks Sal, that's what I understood.

[david.avrahami@]

Sal,
If my car is an 87 and it has a catalytic converter BUT it has only 100 cells configuration.
The O2 SENSOR IS CONNECTED.
I am about to install the recommended AEM gauge, replacing the sensor with the one supplied by the kit.
1. Am I to connect the white wire to the OLD DME wire?
2. Do I switch the sensor setting to #4?
thanks

[Jcslocum]

Not trying to hijack or change course here...

We have multiple cars and each has a bung installed for the WB sensor. I use an Innovate LM2 for the stuff. I like that I can plug it onto my carbed cars as well as the later lear cars. Does all kinds of data logging, etc. I picked up a cheap TPS and put it on a little bracket to measure TP on the old carby cars just for a data point. Kinda geeky but adds fun and info.

Just another device for you consideration if you own multiple cars.

LM-2 Wideband O2 Digital Air/fuel Ratio Meter

[DaveMcKenz]

Originally Posted by david.avrahami@

Sal,
If my car is an 87 and it has a catalytic converter BUT it has only 100 cells configuration.
The O2 SENSOR IS CONNECTED.
I am about to install the recommended AEM gauge, replacing the sensor with the one supplied by the kit.
1. Am I to connect the white wire to the OLD DME wire?
2. Do I switch the sensor setting to #4?
thanks

That's exactly what I did and it works fine. AFR is displayed. If you put a bullet crimp on connector on the white wire, it plugs into your DME connector.
Good luck,
Dave

[david.avrahami@]

Dave,
which wire (color) or? do you plug the WHITE wire coming from the AEM GAUGE?