Do these maps look strange?

[dtcohen]

Here are the maps that I pulled off of my 2005 xb12r. The bike has full micron exhaust, breather bypass, and had the airbox lid removed. The maps look quite different to what I have seen from other sources, so I thought I would get some other opinions.

Also, when looking at the maps, does a lower value correspond to a longer pulse of the injector (i.e. a richer mixture)? That seems backwards to me, but from what I have seen it seems that lower values equal more fuel.

 

[lowkey]

The lower the value the less the injector is open, so no. The map could very well be tuned to that exhaust setup, what makes you think it isn't right for the bike? Is it running bad? Popping on decel?

 

[dtcohen]

The bike has a slight stumble off idle. It sounds like it is backfiring through the intake a little. Not a loud bang, but more like a puff and a loss of power. It seems to be ok once I am moving along. It doesn't idle very well and it does pop on decel.

 

[lowkey]

What is your AFV value at now? I'd start datalogging and running it through megalog viewer to iron it out, you might want to go through intake seals and other parts to make sure it's all in good order as well.

 

[dtcohen]

Here is a screenshot of my ECM runtime page. This was with the bike sitting in my garage not running. Does the bike need to be running to get an accurate AFV? 74.5% seems super low. If that is correct then doesn't that mean that my maps are super rich?

 

[dtcohen]

Here are a few more things that I have done. I pulled the plugs and replaced them. Checked the static timing. and fixed what may have been a vacuum leak. I have attached a couple pictures of the plugs and the rubber cap that may have been causing a vacuum leak. The plug from the front cylinder is on the left in the picture.

 

[Cooter]

The AFV below 100 leans out the whole map and 74 is really low! Above 100 is rich.

Sounds like the bike is running very lean too. You should diagnose the problem WAAAY before you attack the maps.

Like lowkey mentioned... intake seals, airbox TB seal leak, old O2 sensor... theres a reason the ECM is pulling that much fuel out but you haven't given any pertinent info, so we are guessing blindly, just like you.

You could set the AFV back to 100 and the bike will immediately run better, but you need to find out why it changed or it will change again. Unless you've been messing with the maps before and that caused it.

I personally set the AFV adjustment limits to about 90-110, but opinions vary.

 

[dtcohen]

would it hurt anything to re-set the afv to 100% and take the bike for a ~30min ride then look at it again to see if it has reverted back to a low number? It seems like if I had a vacuum leak somewhere that the afv would be high to compensate for the extra air being drawn in.

I agree that I need to make sure there aren't any other issues before changing any maps.

 

[rchuff]

Replace that rubber cap that is dry rot. Those plugs look like they are to rich.

 

[dtcohen]

Replace that rubber cap that is dry rot. Those plugs look like they are to rich.

I did replace the cap. I also installed new spark plugs.

 

[Cooter]

"would it hurt anything to re-set the afv to 100% and take the bike for a ~30min ride then look at it again to see if it has reverted back to a low number? It seems like if I had a vacuum leak somewhere that the afv would be high to compensate for the extra air being drawn in.

I agree that I need to make sure there aren't any other issues before changing any maps."

Sure. I would. I just didn't know if there were earlier changes you haven't mentioned.

 

[dtcohen]

I haven't made any changes to this bike. I just purchased it last week. The maps that I posted at the beginning of this thread are what were on the bike when I got it. The bike has Micron exhaust and the airbox lid has been removed. It has also had a breather bypass done on it.

I dont know if the guy I got the bike from had made any changes to the maps, but based on what I have seen they have been altered at some point.

 

[Cooter]

I would't even concern yourself with step 10 yet. Start at step 1.
The lean AFV is certainly an issue. Set it to 100 and see if it changes back, at least it will be rideable

 

[lowkey]

If it was me in your situation I would save the maps on the bike currently then flash the race maps as a known decent starting point. Set the AFV to 100 and calibrate the TPS right after flashing. If after a 30min ride AFV is again drastically off start chasing down the cause... the problem with an unknown map is exactly that and could very well be the cause of your problems. Keep in mind AFV is adjusting the whole map globally by percentage, so if say only the 4K RPM fueling value column is off from what is needed and the rest is fine the AFV corrections will affect all of the map (the good and the bad cell values).

 

[lowkey]

Aldo I think you said you have Ecmspy right? Open your rear fuel table from the EEPROM you have on the bike and switch to 3D view Open another Ecmspy window and load the race map rear fuel table and compare them side by side looking for a cell or cells with values out of the ordinary, the profile should also look similar between the two. Do the same for the front fuel map and both timing. Also check the last tab to compare the other parameters are setup correctly. This is all if you choose to stick with it over the race ECM data of course.

 

[dtcohen]

I got home today and compared the "race" maps to the maps on my bike. My fuel maps look a little richer in the high rpm high throttle region, but look pretty similar everywhere else. The ignition maps on my bike also have a little more advance in the high rpm high throttle region. I decided to reset the AFV and see what happened. The bike ran great. The stumble off idle was gone and there wasn't any popping on decel. It also idled pretty good. I took it for a short ride, probably about 20 minutes. When I got back to the house I hooked it up to the laptop and the AFV was still at 100%. (if I pulled it up right)

Just to make sure I did this right here is how I checked the AFV:
After my ride I hooked up the laptop, opened ecmspy, turned the key to the run position but did not start the bike, and fetched the eeprom. The AFV value was still at 100%

 

[lowkey]

No need to fetch it. You want to blip the throttle and watch the TPS bar on the main gauge tab, if its responding to input you are all good just switch tabs and check the value and that is what is currently being applied to the fuel maps. Sounds like you have all that down right, now just ride and check that value as it could take some miles before it starts applying AFV change. If the ECM's AFV wasn't locked to the value it was at before it will return there again if nothing was changed but putting AFV to 100. Since you compared what you have against the "race" and in the upper area it is slightly richer it is probably suited to your setup fine. Lastly 02 sensors run about $20 and show signs of needing replacement at the 15K mark. Just some info on one possibility to look at if AFV changes drastically again which I think it will.