Burned a valve....

[cjmech]

In the ECM config tab it has the open loop learn enable selection. This is what I believed to enable/disable the learn functions..

The tuners computer has any logs that were saved. I have megalog HD but wasn't able to hook my comp up to the bike while on the dyno.

I went in and checked the open loop correction and its at 105...

 

[EricZ]

No, you want to leave the open loop learn disabled. I can take some screenshots when I get home to point out exactly what you should be changing. If you have only been enabling/disabling the open loop learn, then you will need to start over with all your tuning efforts. It sounds like a better understanding of the software is needed. I am happy to help you learn

 

[cjmech]

That would be great.

During the tuning process this has been disabled. Once the tune was set it was re-enabled.... Leaving it disabled wont cause any issues?

What does the open loop correction % do to the open loop operation?

Im all about learning this software so any info you have to get my ride back on the road is greatly appreciated.

 

[EricZ]

No, leaving the open loop learn disabled will not cause any issues. The factory tunes don't even use the open loop learn function.

The open loop correction is applied any time during open loop operation (outside the closed loop boundries) but not at WOT or idle.

 

[gbalias]

sounds right. although a couple functions with the ecm are still strange to me in the way they are implemented, or not.

theoretically, if you set your OLC (open loop corr) to 100, then tune the full map and have those areas of that region at an AFR you want, by then re-enabling OLC, youll then be fueling at the tuned values multiplied by the OLC. so why the factory would then add fuel if they tuned it right? you would make the tune with the consideration of proper fueling in those areas from the beginning.


not sure if youve done this or not, but when you view the maps in spy, you can tick the option to graphically display the regions overlayed onto the maps. this will help you understand where on the maps certain things are happening (the LCL is a red shape, WOT is a blue line IIRC, etc)

 

[ich]

The open loop correction is applied any time during open loop operation (outside the closed loop boundries) but not at WOT or idle.

OLL ist in OL oberhalb (lastbezogen) des CL aktiv und erhöht den AFV um den AFV Increase Factor, wenn das Gemisch länger als Open Loop Enrichment Delay als mager gemessen wurde.

 

[EricZ]

ich, can you respond in English? I don't know German and Google translate makes nonsense out of your response. I'd like to understand what you post. Thanks!

 

[cjmech]

I can take some screenshots when I get home to point out exactly what you should be changing.

Eric,

Did you get anywhere with the screen shots?

 

[cjmech]

So interesting day on the dyno today.....

We figured out that at about 202c and 4-5k rpm the bike is dropping the O2 voltage(no idea why). We can duplicate the issue over and over (sensor is brand new) when the voltage drops it thinks the bike is lean and dumps loads of fuel in.

So with that we locked the AFV ranges to 100 and 100 so that It couldn't change the map based on the 02 sensor voltage.

Monday I am going to check wire in the harness to see if there is a break in the wire but not sure I will find anything since we can replicate the issue so easily.

I am interested in any theory on why I am having this issue and what i might be able to do to fix it....

I dont like the idea of locking out the AFV but at this point I dont know what else to do.

 

[ich]

OLL: http://www.ecmspy.com/tgv2/guide2.shtml.en#5.1.3.5

 

[cjmech]

Supposed to go down to get the bike this afternoon. Eric, did you happen to get those screen shots? Gb, any other ideas?

 

[mrlogix]

ich, can you respond in English?

THERE HE IS!

 

[gbalias]

with what ive read thus far.... at the track (and why you were experiencing the cooler cylinder temp up front) the extra fuel was fouling the plug and keeping it from firing.


does this happen ONLY at that rpm range and temp? what if you run up the RPM when its at 160-170degC? same issue?

you dont have anything squirrely going on with the regions do you? at that RPM on the rollers, where in the cells is the throttle in relation to the region boundaries?


on the flip side, it may still be possible there isnt enough fuel, which will show on the O2, as lean, and then the ECM will compensate but actually not able to still provide if the lack of fuel is a mechanical issue with delivery. did you verify on the dyno that when the bike's O2 shows real lean at 4500RPM, does the dyno sniffer show the same? or show real rich??

 

[gbalias]

other thing to try is start over with a bone stock EEPROM, reset TPS, and see if it does the same thing with no ECM modifications.


if the tune is good, running without AFV is fine. just like a carburetor

 

[cjmech]

Got the bike back. Runs good, could still use some fine tuning for the street.

Gb, PM me an email and i will send you the maps and data log from today. I am interested in what you see with the log vs map.

Bike made 95whp and 83 lb-ft with this tune. Adaptive fueling is locked out so that it cant correct in open/closed loop.