| Author | Message | ||
     Andymnelson |
Hey all- So I bought a 99 X1 this past weekend. It has the Force exhaust, Race ECM, and stock breadbox intake. I will be installing a Forcewinder intake soon. It also had a Power Commander, which I promptly removed upon arriving home! I then reset the TPS and AFV, and she runs good now. Except.... under 3000 RPMs. It's not bad as tho there's an issue with the motor, it just doesn't like to stay in that under 3000 RPM region. Makes 30 mph cruising very difficult! It this a characteristic of the X1, of the Force pipe, or do I just need a better fuel map? If it's a mapping issue, does anyone have a decent map that might work? I have ECMspy and understand it fairly well, as I have used it on my XB9. Thanks! | ||
| Tdman77 |
Welcome the the FI buell world. If you think the Race ECM (below 3K is bad) the stock is almost unrideable! The Forcewinder should be a better match for the Race ECM since the race eeprom was tuned for the race exhaust and intakes. I went into the fuel maps and smoothed out the cells so that there weren't any big jumps in values in adjoining cells. This made a huge difference and really smoothed out the 2.5-3K rpm range. But the is still a slight stumble around 2.8K on my bike. I think the only way would be to put the bike on the dyno and do a full tune with custom maps. | ||
| Andymnelson |
Yeah, I gotta believe that there is a solution in there. I mean, my XB9S is smooooth as baby's bottom! I'm curious as to how much of this is due to the Force exhaust? Maybe I should just deal with it until I get an intake on it... | ||
| Andymnelson |
Any other thought/input from those of you running the Force pipe? | ||
| Lowroad |
Tom, is there any way for you to copy your map and send it to me? Id' love to try what you came up with. | ||
| 1badbuell |
Come back to the darkside and convert back to a carb! Otherwise you are looking at a dyno tune. | ||
| Tdman77 |
Eric - I got your pm. I'll get it downloaded when I get home. Got to replace my header gaskets and was going to do a TPS/AFV reset any ways. | ||
| Preybird1 |
"Checking AFV Value Plug in the laptop again and check the AFV. You want a figure between 90 and 110, ideally as close to 100 as possible. If you have a low AFV value, you are too rich on your map within the closed loop area. This is dangerous as it can cause lean fuel in open loop! If you have a high AFV you will be too weak in closed loop and the ECM is compensating, but could leave you rich in open loop.""Checking AFV again! Check, check and check the AFV again! If it’s out by more than 10% then you need to adjust your map!" this is directly from the ECM spy help page Yes it is to rich i have the same problem. my afv was at 86% when i checked it today, but thank god i didn't get 400 miles on and then take the bike into high rpm and cause damage to the motor. I did notice the fuel enrichment was real high at 133% | ||
| Eshardball |
My understanding is that the AFV resets itself after a period of highway riding but I am new to FI Buells and I have a lot to learn. Thanks Tdman77 for all of your help. Wish I was going to Homecoming. | ||
| Kalali |
Russ, if your Enrichment was at 133% after a long ride, either your Enrichment table is messed up or your temp sensor is not working properly, assuming everything is OK mechanically. This may also explain your low AFV value. Except that the AFV also depends on the condition of the O2 sensor (closed loop) and only works with the rear cylinder. Altitude also plays a role in the AFV. As for the AFV setting itself, it is true within limits. The AFV value is the multiplier used by the ECM as it reads the fuel maps. For example, AFV=100 means the ECM is using the maps as they are. AFV=80 means the ECM is using 80% of the values of the maps or in other words the maps are 20% too rich. Sorry if this is all obvious but I figured I will throw in my 2 cents. |
