| Author | Message | ||
     Jsimpkins |
Could the AFV be causing the cut-out while cruising steady state. I'm thinking it could be over leaning the mixture while "learning" or possibly doing a "reset"? Do you think the factory would have an answer? One thing I've found out. If I'm twisting the throttle (ie: changing speeds alot) this cut out does not happen, it only happens under steady speeds and throttle position. Anybody? | ||
| Jos51700 |
The AFV is the result, not the cause. It sounds like your bike is just plain lean, or has an intermittant issue. What mods have you done? | ||
| Jos51700 |
Sorry, I just reviewed your profile. Please define "Race Intake". To me, because you state it stumbles below 3500 RPM, I would first set timing (By the book, no advancing/retarding), and see how it runs. Then reset TPS. See how it runs. Then check for intake leaks, and also replacing the fuel filter never hurts. What is your AFV? What do other FI bikes in the Mile High city have for an average AFV? | ||
| Natexlh1000 |
Mine has always ALWAYS done that. It only does it on the highway. If I'm romping on it, it won't do it. When I first got the bike, I thought it meant that it was about to crap out. 83,000 miles later, still hasn't crapped out. Still hasn't got any better. Still hasn't got any worse. I have never heard a solution for this. I think it might be just a software bug or something. | ||
| Jos51700 |
Nate, have you set your timing? I think some if it is just "factory EPA leanness". | ||
| Angusmcoz |
What RPM are you cruising at? What gear? My 2002 X1 will puke and sputter around town at anything over 3000 rpm for more than 5 minutes. If I keep it between 2000/2500 rpm at in town speeds and it's as happy as could be. 50 mph and up it will cruise all day, no problems. As Jos51 said check your timing and also check for proper adjustment of your primary drive chain. | ||
| Natexlh1000 |
It sputters most at 70-80 or so in top gear. It will fart every 15-20 minutes. I haven't ever checked the timing. The timing was checked over and over when it was under warranty and Oklahoma even replaced the sensor! The last time the timing was opened was 2002  Can they be checked with a timing light? The only method I ever heard of is to check it with the engine off and the cover opened. Oh and Oklahoma tried to stop it by retarding the timing a bit. Fuel economy dropped to 35, power was missing a lot and the damn thing popped even worse! | ||
| Jos51700 |
EFI bikes like timing at TDC only, because spark AND fuel are timed off of that. I prefer static timing, but if you own a shower cap, dynamic works ok. | ||
| Oldog |
 but if you own a shower cap, dynamic works ok. LOL } | ||
| Jsimpkins |
"It sputters most at 70-80 or so in top gear. It will fart every 15-20 minutes. I haven't ever checked the timing. " This is exactly what mine does. If I vary the throttle it will extend the time between farts. If it was timing, would it not happen all the time? Only a specific condition cause s the problem. I do believe it is a over lean condition, part of the "lean until too lean condition, then back off a little logic" in the ECM. If I could get the blasted EMCspy to work I'd fatten the midrange up some to see if that cures it. Mods: Full Buell Race kit. Stock air box, modified by removing all obstructions. J- | ||
| Natexlh1000 |
Just a head's up: If you gut an X1 airbox, it will not seal along the bottom and it will let dirt in. I bought mine with the airbox already gutted. I finally gave up and threw a forcewinder on there. (Message edited by natexlh1000 on July 08, 2008) | ||
| Jsimpkins |
You are right, it will not seal, thats why I modified it. I added blind nuts to the inner piece drilled and fitted the outer piece so that it squeezes the two together on the bottom. Seal tighter than a bankers.... Well you know. j- | ||
| Natexlh1000 |
That's great. where did you end up putting the air temp sensor? The monkeys that gutted my box just ziptied it inside the box in a stagnant area. | ||
| Jos51700 |
The main reason I suggest timing is because most tube-frame FI bikes went out the door with poorly set timing, and the first step to any diagnosis is making sure everything adjustable is set properly. That's all. Poor timing on fi Buells causes a very noticable power dip in the midrange. 2000-3500-ish | ||
| Natexlh1000 |
Well I have no dip in power on that thing anywhere. Compared to my 2008 XB12X, it's a bear! First gear throttle wheelies from 2500-redline. I understand your reasoning though. I think the thing to do would be to throw ECMspy on a laptop and go for a ride, logging the data. It would be crazy awesome if we could solve this irritating issue finally! | ||
| Jsimpkins |
Ok, I did a TPS reset, its been about 3500 miles since the last one, and things wear. I also did a AFV reset using the VDSTS software. I also gutted the airbox as previously stated. So after 350 miles thus far this week ( I commute ) ... no farting/cutouts! Its seems to be making good power too. I mounted the IAT sensor using the supplied mounting gizmo that came with the race kit. The instructions said to locate it on top of the box, just forward of the intake stack. I've never had any issues with it, such as weird idling or heat soaking. so maybe its a 3500mile TPS reset thing. j | ||
| Jos51700 |
"so maybe its a 3500mile TPS reset thing." Very possible! Let's hope it continues to perform well for you! | ||
| Mmmi_grad |
QUOTE! I mounted the IAT sensor using the supplied mounting gizmo that came with the race kit. The instructions said to locate it on top of the box, just forward of the intake stack. So this is on top of the box or the back wall? Are instructions here onsite? | ||
| Jsimpkins |
"QUOTE! I mounted the IAT sensor using the supplied mounting gizmo that came with the race kit. The instructions said to locate it on top of the box, just forward of the intake stack. So this is on top of the box or the back wall? Are instructions here onsite?" It is mounted inside the airbox, on the top "flange" not on the inside side panel of the airbox. According the instruction that came with it. | ||
| Jsimpkins |
""so maybe its a 3500mile TPS reset thing." Very possible! Let's hope it continues to perform well for you!" So far so good. Actually, darn thing is running great, better than it ever has. It must know this is the last straw for it, and has decided to clean up its act. j- | ||
| Mmmi_grad |
This " brain fart " thing happens on my x1 too. I was starting to get relaxed yesterday cruising at around 75 when it did cut out for a sec. Made me grab tight the bars and a few secs after that hit one of the worse asphalt bumps I have ran over on the freeway in my memory. I have experienced this cut out before but it doesnt happen alot. maybe once in the 250 miles i ran. This fart cut out every 20 minutes talk like Jsimpkins is having is crazy. I am on a freash TPS reset and just road around 450 miles this weekend. Only cut out twice on me. Intake gaskets are new last year. Timing is right. Runs great otherwise although still on stock ECM. I have another stock ECM I want to put in and play around with. Then one will become an ECMSPY experimental. | ||
| Jsimpkins |
1500 miles on latest TPS AND AFV reset along with a complete gutting and cleaning up of the stock air box and no sputters. I also just put the Race header and can back on (it cracked two years ago) and the the power delivery has smoothed out even more. Crank the throttle and she go-go's baby. It'll pull red line and bump the rev limiter in top gear now....far faster than a father of three should go Had to do it once. j | ||
| Mmmi_grad |
Does anyone have anything else to add on this? | ||
| Jsimpkins |
"Does anyone have anything else to add on this?" Sure, what year is your X1? Do you have the race ecu? How do you do the TPS and AFV resets? How your replaced every part of the EFI like I have. Use the XB parts. This seems to have cured mine. The TPS reset is critical. It must be done exactly the right way. Too much pressure on the valve and you get the sputter, too little and same. I twist just enough (closed) to get a very slight "stick". If you crank it hard closed, the valve goes to far, and I think causes a "over" lean condition to get programmed in. I also think the throttle body and Sensor wear with use and must be reset fairly frequently. j- | ||
| Tom_b |
Mine used to cough once in a while like described above. My throttle body broke the shaft, when i replaced it with new, it quit. The shaft being broke wasn't what caused the once in a while cut out. when it broke it was BAAD. Some glitch in the factory software and throttlebody would be my guess. | ||
| Zano |
Thanks Everyone for all the info. I just bought a 00 X1 red stripe with 20K on it and it has all the symptoms described here. I've tried to rest the AFV a couple of times without any change in performance. I guess a TPS reset is in order and a fresh fuel filter. | ||
| Jsimpkins |
Ok, I have about 2500 miles on the latest TPS/AFV resets and bingo...she's doing it again. Last night on the way home it missed/cut out three times. rpm 3800ish twice and once pulling away from a stop. I'm doing a TPS reset and AFV reset tonight, ride it tomorrow to work and see if it goes away. One thing that might be a factor is weather turned cooler. Denser air. J- |
