7 replies to this topic

[ayresyy]

  I am looking at fitting an AEM Wideband sensor and EUGO controller with CAN and 0-5v outputs on it.

 

  The thinking was that this could be connected to the Garw dash inputs to show real-time A/F ratios, but also I could fit it in place of the original narrow band sensor in the turbo down pipe and not have to weld in an additional sensor boss and run 2 sensors. I would just connect the correct 0-5v output to the original narrowband sensor wring and maybe a resistor in the original sensor heater circuit to avoid the EML coming on. 

 

  Has anyone else replaced the original sensor like this and has it worked OK? 

[Ormes]

Obviously need to unsure lambda interaction is identical for the ecu to avoid EML and most importantly ensure fueling remains consistent.

[Nev]

I would't remove your narrow band lamda sensor, your ECU needs it for idle and low RPM fuel calibration.

Edited by Nev, 20 August 2019 - 08:55 AM.

[alexb]

Keep in mind that the narrow band sensor switches faster than the wide band. I was advised against doing the same as you described for that reason. Just welded in a second bung. And a third one for EGT. The more bungs, the better 

[ayresyy]

  Ok, I'll bear the switching speed/frequency in mind, I can't currenlty see the frequency of the AEM unit I have been looking at. Although it should have a compatible narrow band output from the controller, maybe I would be safer leaving the OEM once in place then.   

[Nev]

From what I've read the narrow band output exactness from a wide band sensor is not as sharp, so you could get problems.

 

Just take your car to any exhaust fabricators with the floorpan off and they'll weld in a bung for you in 20 minutes for a few quid I'm sure. BTW, usually widebands usually need to be far down stream in the exhaust.

[ayresyy]

From what I've read the narrow band output exactness from a wide band sensor is not as sharp, so you could get problems.

 

Just take your car to any exhaust fabricators with the floorpan off and they'll weld in a bung for you in 20 minutes for a few quid I'm sure. BTW, usually widebands usually need to be far down stream in the exhaust.

 

 

  It shouldn't take me long to weld a SS boss into the system, I was just aiming to simplify things by only having one sensor in one location. I do now recall that a wideband sensor likes to be a bit further away from the turbo to give it a decent life as you mention it needing to go further down stream, so 2 sensors it will be. 

                                                                        

[Chapelhill]

I have put in wideband to replace first lambda sensor. The simulated lambda sensor output seems to work ok on my engine but I do get checklight due to heating circuit not connected.(wideband controller has its own heater control) Not sure if I will try and map it out on the ECU or fix it with resistor or similar.