| Author | Message | ||
     Two_seasons |
Those of you that have the Race ECM, do any of you experience, around 3,500rpm, a occasional "cough" or a brief cutout, while you are rolling down the road? This is specific to the Race ECM and approx. 3,500 rpm steady. I tried an experiment with my '99 X1 Lightning last night. Left it in 4th gear, taching steady above 3,500rpm and got the "cough" through the exhaust. It has done it in 5th gear at approx 3,500, so I wanted to see if it would do it in 4th gear. Sure enough, it did. I'm going to try it in 3rd gear at approx. that rpm and see if I get it. I wonder if it will happen closer to 4,000rpm. For reference, I've never had this happen on my '00 X1 Lightning with a stock ECM. I'm starting to think my fuel maps are messed up. This has happened from the day I purchased it, Nov 07, 2010. Using different gears should rule out the TPS, I'd think? Just curious what you guys have experienced. | ||
| Bikerrides |
I keep getting it when holding steady in any gear between about 2800 and 3500 rpm. I have a race ecm and am beginning to wonder if it is my fuel map. I have put a new O2 sensor, header gaskets, and just last week a new engine temp sensor and am still getting the same skip/miss when holding a steady rpm when in closed loop. I have noticed that it doesn't miss when held steady above 3700 such as 80 mph freeway cruising speed. As soon as the Rs come below 3700 and it goes back into closed loop, it'll begin that steady skip. Let me know what you figure out because I believe I may be looking at the same or similar issue. | ||
| Snowbees |
I think maps need tuning to your intake, exhaust, altitude etc or live with it. Some say its the transition point between closed and open loop but since i played with the maps on my 99 x1, no more hicups. | ||
| Two_seasons |
The more I think about it, the more it seems to be random regarding gear selection. BUT, and this is certain, it always happens right around 3,500rpm to less than 4,000rpm. That infamous "transition zone". And, by the way, this always happens when the engine is warmed up. Didn't happen last night commuting home from work, 4th gear. And it never seems to happen whenever the throttle is moved, even slightly back and forth, while rolling down the road. The fact that it has never happened on my stock ECM '00 X1 Lightning has me thinking fuel maps. Loose1 was over here at Homecoming and adjusted my fuel maps for idle, and it definitely idles smoother. He mentioned that when you adjust the fuel maps you have to add 1.05 times to get the correct values. We had several people in the garage when he was tuning, but the jist of it was every time you adjust a fuel cell, you must do it in 5% increments, no more, on both front and rear cylinders. As time permits, I'm going to record where the fuel maps currently are set the Race ECM, and adjust the individual cells. QUESTION: When you change fuel map cell values UP, such as 56 to 57, does that give more fuel to that cylinder? And another question. Does the Race ECM ever really get into the closed loop mode? (Message edited by two_seasons on June 08, 2012) | ||
| Steveford |
I can't answer your last question but 02 X1W w/ the factory race kit does not cough and cut out when the bike is hot. It will do it when it's cold. Closed loop means that the 02 sensor is up to temperature and the bike is no longer running off of the preprogrammed mapping. I picture a circle: it has an opening until the O2 sensor is in place and then the circle is closed. | ||
| Two_seasons |
Steveford, when you say it does it when cold, do you mean like when you get it into 3rd gear initially? | ||
| Two_seasons |
I answered my own question about higher fuel cell value = more fuel. It does indeed. When I ride, I start it, let idle for approx 20 seconds, then start moving. I've got about 1/3 mile before I enter a 45mph zone. Once there, I shift twice, and run in 3rd at about 3,200rpm for approx. 3/4 mile. This is where it hesitates, when I transition to 3rd gear and just start to roll on the throttle. Never does it in this "zone" when warm. I've been studying the nine zones in the fuel cell map this am. I really need to get comfortable with this area of ECMspy. (Message edited by two_seasons on June 08, 2012) | ||
| Steveford |
It's in 2nd gear but that's only because I'm still riding in a residential neighborhood. It takes about 2 miles or so for the O2 sensor to get up to operating temperature. Once that's up to temperature (closed loop) it never hesitates or bucks. I would suspect the 02 sensor is what's causing your problems. Over on the X1 files I believe they list a Bosch sensor which you could try. | ||
| Bikerrides |
Does the race ecm come pre-programmed? If so, are the maps different than stock? Assuming yes to both those questions, could you then load the stock maps into the race ecm and therefore have a stock ecm? | ||
| Two_seasons |
Yes, pre-programmed. Yes, different than stock ECM fuel maps. You could load stock into race ecm, but the point of having the race ecm maps is that you get better performance with race ecm/aftermarket exhaust. Better fueling across the map. I think the next thing I'm going to do is copy the current config, then play around with zone 5 of the ECMspy. Looks like that is where my problem lies. Off to work I go. | ||
| Raceautobody |
When I ride, I start it, let idle for approx 20 seconds, then start moving. I've got about 1/3 mile before I enter a 45mph zone. Once there, I shift twice, and run in 3rd at about 3,200rpm for approx. 3/4 mile. This is where it hesitates, when I transition to 3rd gear and just start to roll on the throttle. Never does it in this "zone" when warm. Your bike is just coming out of its cold enrichment stage by then. 20 second idle and a little over a mile ride time the motor is just getting warmed up. Live with the cough at that point of your ride or let it warm up longer before you take off. | ||
| Two_seasons |
It's coughing after a full heat soak. Sometimes I get it after several miles, other times not at all, other times 50+ miles. I rode to Appleton Wednesday and it did not cough going up (100 miles each way) but did it twice coming back. It stumbles sometimes while cold and going into 3rd gear, on throttle. | ||
| Snowbees |
datalog with ecmspy (when warmed up), run logs in megalog viewer, great tool for adjusting maps or just viewing where things are going wrong. |
