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wideband wiring correct? also questions at the end.
I drive a 99 NB1 non california car, put in an AEM UEGO wideband 02 sensor. all the wires are soldered, shrinkwrapped, and taped. The gauge does in fact work. Upon startup it stays at 14.7 and after a few minutes (5-10 minutes), it either goes fully lean or it jumps from super rich to super lean. Upon the latter, i can feel my car jerking at regular throttle. When I romp on the gas, it goes to very rich, which is expected. I think it is a calibration issue, based on the fact that the guage has power and ground, and i think i spliced to the correct wire on the harness side. I also callibrated it on tunerstudio, but maybe i did it wrong? Can someone verify that I hooked it up properly?
A few more questions:
does my downstream o2 sensor have to be disconnected?
is there a "break in period" for the wideband itself?
Thank you.
I think i set it up correctly?: from wideband sensor. torqued to AEM spec. taped off the digital output from actual gauge. yellow cable is ground. analog signal is attached to the blue wire that was attached to original 02 sensor. All the other wires from original 02 sensor to ECU were just tucked and taped off. blue wire I was talking about in previous photo. This was attached to original 02 sensor. Gauge power spliced to a keyed 12 volt source. A/C removed and wires put through firewall from A/C holes to guage in dash.
You need to give more information about your car setup. It sounds like you are running an aftermarket ECU if you are using TS, and did a sensor calibration. Is that right?
If so, does the wideband AFR reading have control of the fueling through one of the TS panels? It would have to for the O2 sensor to cause changes in how the car is running. A quick fix to keep the car running reasonably would be to turn that off until the sensor is under control.
It sounds like the sensor may be faulty. My first AEM sensor did exactly what you describe, and I called up AEM and they said it was faulty, and shipped me a replacement sensor. The replacement worked fine.
The calibration scaling that AEM has on the website for the sensor is correct, and is the one you should use in TS. (But it is a bit buried in the back of the online instruction manual for the AFR controller.)
At least for me, a wiring diagram would be easier to grasp than the pictures of the wiring you have above.
06-06-2021, 01:53 PM
wideband wiring correct? also questions at the end.
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