G oog le BadWeB | Login/out | Topics | Search | Custodians | Register | Edit Profile

Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » Archive through March 20, 2008 » Near stall/hesitation » Archive through September 16, 2005

« Previous Next »

Author Message   Pcmodeler Posted on Tuesday, September 06, 2005 - 06:19 pm:        I had posted about this a few weeks ago. Thought it was related to near 100 degree weather. The bike does a near stall/hesitation on take-off. It idles fine. New air filter. Checked No.1 plug and it's fine. The problem seems to be similar to when you flood a car with a carb. I need to pull the throttle back just right and slowly let off the clutch while keeping the rpm's up. It's fine while doing normal riding, but anytime the rpm's come down, it wants to stall (except at idle, which is set fairly normal). I had the tps reset back in April, but had ridden it for a couple of months before this problem started happening. Could it still be the tps (don't fully trust dealership)? I thought about the plug wires, but it doesn't really sound like it's missing. Don't hear any kind of air leaks. Any other ideas?   Hkwan Posted on Wednesday, September 07, 2005 - 01:14 am:        What rpm is the idle sit at after you have ridden the bike for at least 10 min?   Pcmodeler Posted on Wednesday, September 07, 2005 - 12:42 pm:        I'll need to check to get the exact rpm, but it's a fairly decent rpm. Not low enough to die but not too high. The rpm is pretty much the same as where it's always been.   Pcmodeler Posted on Friday, September 09, 2005 - 10:09 am:        Anyone......? Any ideas? Where to start?   Chgojim Posted on Friday, September 09, 2005 - 01:22 pm:        is it only happening when the bike has just been started? mine has stalled a few times, if i do not let it warm-up for a minute, before taking off on it.   Pcmodeler Posted on Friday, September 09, 2005 - 03:40 pm:        It's actually happening after the bike warms up. Runs fantastic when the engine is cool.   Buellin_ri Posted on Friday, September 09, 2005 - 07:01 pm:        poss temp sensor. See if it still sits where it is supposed to (in the base the air box, not some where down near the head). If the ecm thinks its a certain temp and its not, it will richen and lean itself out. Just a place to start if temp is the only thing that seems to be a factor. Good luck.   Pcmodeler Posted on Friday, September 09, 2005 - 07:36 pm:        I'll check that. The problem seems to actually be getting worse. In the 70's tonight. Rode it for about 5 minutes and it practically stalled while driving. I can hear and feel that it's not running right now. It seems like it is running at about 3/4 the power it should be. Doesn't sound like it's missing a cylinder. No popping going on from gas not getting fully fired. That almost leads me to believe that maybe it's not getting enough fuel possibly. I'll pull the number two plug tomorrow to make sure it's alright. Thinking it will be. No longer think it's the plug wires either. Of course, I could be wrong about all of those things. I did adjust the idle up a bit. It was at about 900. Moved it up to about 1050 but I'm pretty sure idle wasn't the problem as it's has always idled at about 900.   Buellin_ri Posted on Friday, September 09, 2005 - 08:26 pm:        bad wires could also be an issue, but doesn't sound like your problem. Get more of a skip or a dead cyl all together.   Pcmodeler Posted on Friday, September 09, 2005 - 09:56 pm:        Not sure. Doesn't really seem like it's dropping a cylinder. It seems like they are both running but that maybe one isn't as strong as it should be. No popping from excess fuel igniting. Not smelling excess fuel at the exhaust. I'm hoping that I can track possible problems down tomorrow as I really hate to take it to the shop as I've been unhappy with the service/support with my local dealer from day 1 and the next closest dealer is a bit over an hour away (one way).   Izzinya Posted on Friday, September 09, 2005 - 11:58 pm:        Buellin_ri Posted on Friday, September 09, 2005 - 07:01 pm: -------------------------------------------------------------------------------- poss temp sensor. See if it still sits where it is supposed to (in the base the air box, not some where down near the head). If the ecm thinks its a certain temp and its not, it will richen and lean itself out. Just a place to start if temp is the only thing that seems to be a factor. Good luck. id tend to agree with the temp sensor they can do real weird things Izzinya   S1lightning Posted on Saturday, September 10, 2005 - 12:14 am:        Funny, Mine just started stalling the same way after a hard throttle off, then hard brake. It wants to stall, not die, to the point where no matter the throttle position it shuts the bike down to a crawl. I have the race kit on mine and just figured that it was a map problem of some sort??   Pcmodeler Posted on Saturday, September 10, 2005 - 11:12 am:        I've got a race ecm as well, but it's been on the bike since day one, unless that's starting to go bad.   Pcmodeler Posted on Sunday, September 11, 2005 - 04:31 pm:        Well, the second plug checked out ok (who's idea was it for access to that thing?) and the temp sensor was where it should be. Going to order new plug wires tomorrow. Is it possible for the TPS to change somehow? Could it need to be reset again. I'm lucky if I put 700 miles on since it was reset.   Buellin_ri Posted on Sunday, September 11, 2005 - 05:51 pm:        Don't think so, but stranger things have happened.   Tunes Posted on Tuesday, September 13, 2005 - 04:33 am:        Pcmodeler - Any news? The way my bike runs just changed on me. I actually heard the bike start running different. I was letting it idle/warm-up during my morning startup routine. After about 30 seconds the idle changed (went down), like it thought it was already warm. I know the engine didn't idle/warm-up like that before cause I never leave my bike when it's running. Then, the ride itself was changed. The bike now high-idles... and slowly returns to 1K. I've heard about this before in BWB... right?   Pcmodeler Posted on Tuesday, September 13, 2005 - 05:37 am:        Asked Dave to send some plug wires. I don't think that's the issue, but who knows. I've got a feeling there's something going on with fuel control and that although it feels like it is flooding, that it is actually not getting enough. I'm sure I'm going to end up having to take it into the shop, which means they will have it for 3-4 weeks and buy then, the really good riding weather will be over.   Cruisin Posted on Tuesday, September 13, 2005 - 01:00 pm:        Tunes, the idle hanging before it drops down is typically caused by the idle adjuster being set too high. Try backing it off a tiny bit and see if it helps.   Tunes Posted on Tuesday, September 13, 2005 - 02:14 pm:        Cruisin - I will turn my idle down and see what transpires. I'll let ya know what happens... and thanks!!!   Tunes Posted on Thursday, September 15, 2005 - 10:16 am:        Turned the idle down... All that happened is the idle went down. I had to use the throttle to get the bike started, which I know is wrong... and it coughed back thru the throttle body! Sure sign of a lean condition. By the way, it coughed before I needed to use the throttle... otherwise, it would turn over but not light-off. After the bike warmed-up, it took it for a spin. The high/hanging idle was still there. I immediately rode the bike home. Off to Scooters today to have the doctor look at the patient. Also, after the ride, the bike now "ticks" of heat. It never did that before either. For those who are interested, I'll keep ya posted.   Edmbueller Posted on Thursday, September 15, 2005 - 12:37 pm:        I have had a very similar experience with my XB12S. It's an 04 that I found brand new at a dealership a few weeks ago. under 3000 RPM it runs like its wants to stall. Smell of gas is apparent whenever it is running. Dealer did a TPS reset at 1600km service last weekend...helped a little but still acting up. I also have the race kit installed at 0 miles...any help would greatly be appreciated. I would love to sort this out before the bike comes into the kitchen for the winter ( I am in Alberta Canada)   Tunes Posted on Thursday, September 15, 2005 - 06:52 pm:        Update - Brought the bike over. Started the bike at the end of the driveway and rode it into the garage. Total running time of 15 seconds, tops. Plugged in the diagnostic computer and looked at the engine temp sensor. Was reading 200 degrees just for that short jaunt... and we watched the engine temp. sensor continue climb at 10 degrees a whack! We agreed that the bike was runnin' HOT! When I say hot, the heat from the engine running for 1 minute was hotter than when my S3 is up to temp. Replaced the engine temp. sensor and zeroed the TPS. Bike is back to normal and running like it should. Turned the bike off and watched the engine temp. sensor go down, just like it's supposed to. Now, you would expect the diagnostic computer to read a sensor failure of some sort, right? Not so on this problem. I mean, the sensor was bad and a new sensor fixed the problem. Does the diagnostic computer only read shorts and opens on the engine temp. sensor? Just wonderin'... I'm just happy my bike is fixed... and it didn't take a week+ under warranty!   Pcmodeler Posted on Thursday, September 15, 2005 - 09:20 pm:        hmmm. Wonder if I have the same problem going on then? How much was the temp sensor?   Tunes Posted on Friday, September 16, 2005 - 03:17 am:        One thing about the TPS... it didn't need resetting... We just zereoed it anyway. With the diagnostic computer plugged in, we could watch the temp soar... and we could see the lean/rich condition bounce all over the place... not like it normally does but WAY out of normal... and you could see the oxygen sensor going crazy trying to adjust to the lean/rich condition. It's more obvious to me than ever that when you have 1 bad sensor for engine management, the bike most likely won't run well at all.   Pcmodeler Posted on Friday, September 16, 2005 - 06:19 am:        I may have to go ahead and order one (temp sensor). If like you say, you had no error codes but yet the sensor was obviously bad, that might explain why I don't have any codes as well.   Fullpower Posted on Friday, September 16, 2005 - 02:01 pm:        are you referring to the (cylinder head temperature) sensor? did you check its resistance, or just replace it?   Tunes Posted on Friday, September 16, 2005 - 04:00 pm:        Yes, the (rear) cylinder head temperature sensor. We did not measure the resistance... but I can call and ask. We did an R&R on the sensor. Hopefully, they still have the dead sensor.   Edmbueller Posted on Friday, September 16, 2005 - 07:13 pm:        BUMP...no responses to my troubles....any ideas / suggestions?   Edmbueller Posted on Friday, September 16, 2005 - 07:29 pm:        Sorry guys I should be more specific as well. I just got home from an across town ride home from work. Bike is getting worse. runs VERY HOT fan is on almost all the time and the weather is COLD today (5 degrees celcius no idea farenhheit sorry) TONS of popping from exhaust on any moderate to heavy deceleration. Bike does not want to run at all below 3000RPM. Could this be a temp sensor also? sounds similar except the popping....sure hope I didn't get a lemon   Buellin_ri Posted on Friday, September 16, 2005 - 08:45 pm:        worth taking a look at.