Breva 1100 Lambda off & CO Trim set

[tris]

Can somebody explain the benefits or otherwise for disabling the Lambda sensor and what if anything would need to be done to the CO Trim

Cheers

[molly]

Come down to my place in Grantham Tris and all will be revealed.

[tris]

Cheers Dave

I'll PM you once I've done the winter servicing and sort a date out

[Zoom Zoom]

There is a point just slightly off idle where the system switches from closed loop to open loop, (or vice versa). That contributes to what is described as snatchy off idle response. Especially noticeable when running through a parking lot for instance. Turning off the Lambda helps eliminate that. As I recall, when a friend turned that off on my Stelvio, there were no other changes made to the map. The bike was much easier to run slightly off idle when running through parking lots, etc.

John Henry 

[lucian]

I know enough to be dangerous but I'll take a stab at it.
 Basically turning of the lambda allows you to run a customized map which has  been developed and tailored  to perform optimally for your bike, without the need for the ecu to be intervening on behalf of the EPA. Where's Beetle when you need him.

[tris]

Let me expand on why I asked.

I've noticed that on a cold day at light steady throttle settings its a beautiful bike to ride and  I don't have any of  the surging that I do on a warm day

Now we know from the MG documentation that certain base parameters (ambient air temp, engine temp above defined levels) have to be achieved before the ECU will allow closed loop operation

So my thoughts were that on a cold day the ambient never gets to the point that closed loop running is possible - QED I'm running on the base map

Therefore if I disable the lambda sensor I "might" get rid of the surging

However, I'm a Mech E and this ECU electronic malarkey scares the heck out of me

I'm scared stiff I could "Brick" the ECU fiddling about up loading/down loading maps or what happens if the Laptop dies midway through the process  (I feel much better having outed myself  )

I don't have a burning desire to wring the last ounce of power/torque out of the bike - I just want it to run nicely across the rev range and the original post was me dipping my toe into the mapping and ECU pool

[pete roper]

You cannot brick the W5AM ECU by reflashing with Guzzidiag Writer.

The end.

[lucian]

Tris, order yourself the cable to connect your bike and you will be off to the races. All you need to know was kindly posted by Beetle here;

  https://wildguzzi.com/forum/index.php?topic=96957.0

   And before you try anything ,you will need to get your sacred screw back to it's proper position. We can help with that once you have your cable, and have downloaded Guzzidiag.  Hopefully a TPS reset has not been done after the screw was moved. We'll know when you get connected and go from there.
Chime back in when you have what you need to properly tune your bike.  Dave

[tris]

I'm not a complete Luddite Lucian 

I've got the cable and can do the TPS reset but its taken about 18 months of moving the sacred screw a single flat at a time but I don't think its far off now.

The bike starts on the button and generally runs well albeit with the slight surge at the light throttle setting

Mollys offer to "cool my fevered brow" is much appreciated as I know he has some good experience mapping his bike, and I feel happier with Pete saying I can't brick the ECU