Narrowband simulation with AEM UEGO

[XiKeiyaZI]

Haha. Figured as much, just wanted to casually point that out just in the event that I was wrong about that. I have seen this information tossed around a lot so I have to wonder where the source of this is rooted.

 

[gofer]

I don't think its a bad source of information, I think its general confusion or a brain fart. Its easily confused when logging through ECMLink across a sensor input because typically you would lock that sensor voltage so the ECU doesn't try to use that input anymore. The front o2 sensor is the only signal you don't want to "lock" or else your car will never enter closed loop. This isn't necessarily a bad thing in certain applications but if you're trying to sim narrowband then you lock the front o2 you're going to be left scratching your head.

 

[XiKeiyaZI]

I don't think its a bad source of information, I think its general confusion or a brain fart. Its easily confused when logging through ECMLink across a sensor input because typically you would lock that sensor voltage so the ECU doesn't try to use that input anymore. The front o2 sensor is the only signal you don't want to "lock" or else your car will never enter closed loop. This isn't necessarily a bad thing in certain applications but if you're trying to sim narrowband then you lock the front o2 you're going to be left scratching your head.

Ahhhh. Thanks for clearing that up! If I could still give you rep, I would, but alas... that's not allowed any longer.

 

[Dert]

I been reading about this "rotary knob" set to P4, where is this "knob" my AEM UEGO does not have any sort of knob at all...the back of my uego has, 2 mounting screws, the plug ins, and a hole. Inside the hole there apears to be a dial that can be turned with a tiny screwdrive. Also inside can see the letter R4, and R14 with R16 directly under it. is the the "rotary knob" if so why does mine say "R" instead of P?

 

[gofer]

Page 10 and 11. AEM UEGO MANUAL.pdf

 

[Dert]

Thanx alot Corey, The instructions that came with my uego were nothing like this, all it had was mounting diagram and diagram to change faceplate and warranty, I had no idea about all this other stuff. I purchased it brand new from punishment too! So running narowband sim is it supposed to be set to P4? Mine is set how it came out the box.

 

[gofer]

Gary, if you look at Figure 9 in that instruction manual you'll notice a graph, narrowband sim is basically a 0-1v simulation of your front o2. The dotted line represents the P4 setting which, by looking at the graph, you can determine thats the setting you'll need to simulate the front o2.

Keep in mind, if you've got ECMLink you set it for P0/P1 so you can log your AFR's and use ECMLink to simulate the narrowband signal through the software. That P4 setting is only if you don't have any other means of simulating the narrowband signal, so the gauge does it for you.

 

[95tsiemad]

Gary, if you look at Figure 9 in that instruction manual you'll notice a graph, narrowband sim is basically a 0-1v simulation of your front o2. The dotted line represents the P4 setting which, by looking at the graph, you can determine thats the setting you'll need to simulate the front o2.

Keep in mind, if you've got ECMLink you set it for P0/P1 so you can log your AFR's and use ECMLink to simulate the narrowband signal through the software. That P4 setting is only if you don't have any other means of simulating the narrowband signal, so the gauge does it for you.

So is it p0 or p1

 

[gofer]

So is it p0 or p1

If you would read the manual it says what each calibration setting is used for, top of page 9.

Configuring Calibration Outputs
The AEM default position is (P0). When set to (P0) (Figure 10A), the gauge displays
AFR values. (P1) is the same as (P0), except the gauge displays lambda values. These
settings (P1 and P0) implement a linear calibration with the most useful voltage range
possible (0-5V). The AFR calibration (P2) is linear and similar to (P1) with a smaller
voltage range (1-2V). The AFR calibration (P3) emulates the Autronic Wideband O2
Sensor calibration (0-1V). The AFR calibration (P4) emulates a non-linear Nernst Cell
calibration (0-1V). Refer to the Table 3 and figure 9 for specific calibration details.

 

[Dert]

Gary, if you look at Figure 9 in that instruction manual you'll notice a graph, narrowband sim is basically a 0-1v simulation of your front o2. The dotted line represents the P4 setting which, by looking at the graph, you can determine thats the setting you'll need to simulate the front o2.

Keep in mind, if you've got ECMLink you set it for P0/P1 so you can log your AFR's and use ECMLink to simulate the narrowband signal through the software. That P4 setting is only if you don't have any other means of simulating the narrowband signal, so the gauge does it for you.

Thanx alot Corey, helpfull as usual

 

[XTurbodTalonX]

I installed an AEM UEGO last night. Are both white wires (the AEM and the stock), supposed to go into pin #4 on the ECU, or does the AEM wire completely replace the stock wire (as in, OEM wire is completely cut off and dangling)? The reason I ask is because I have a CEL and my car is running very poorly. The AFR gauge is always bottomed-out at 10.0, accept for between shifts. I don't understand why splicing or completely replacing the white wire would matter, since there is no longer an input from the stock o2 sensor, just an empty harness. I do have ECMLink, but I do NOT care to log my AFRs at this point.

 

[chrisman287]

Set the rotary knob to p4, cut the o2 wire to the ecu, connect the white wire from the uego to the ecu o2 input. I run all of my cars like this. It works better with the sensor in the stock location.

I hooked up my wideband to my o2 wire but didn’t set the rotary knob to p4 and forgot to set it up in link for narrowband simulation but cold started the car and let it idle for a bit just to make sure everything was working

Does anyone know if this would this mess up an ecu? I hope I didn’t