| Author |
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Hootowl
| | Posted on Monday, March 18, 2013 - 05:16 pm: | 
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Your vent hose might be clear, but the vent itself might be plugged. When this happens again, open the fuel cap and see if it makes any difference. |
Hootowl
| | Posted on Monday, March 18, 2013 - 05:22 pm: |
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You plugged the fuel tank air vent into your intake? You could be pulling vacuum on your tank if that is the case. Try popping your cap. If that solves your problem, let your vent hang free like it is supposed to be, California models excluded. |
Mrsandman
| | Posted on Monday, March 18, 2013 - 09:58 pm: |
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Yah, it seems like I should unplug the air vent line and fill her up and run it again. Just to answere a few other concerns, the fuel vent is also clear and free of debris, I did take it off and inspect it. The line is clear as well.
When Harley Davidson put the bike together, they had the vent line plugged into the air intake? It seemed a bit weird to me but I figued it wasn't a big deal (evidently it is). So i'll unplug it and see how it runs on a full tank...
One important thing that I want you all to know is that, when I drained half my tank and ran the bike, it ran ok. But when I accelerated fast, it wanted to surge on me (just for a moment) and during cruise fine, then I accelerate fast again, it wants to surge. It seems as if the fuel is being kicked to the back of the tank over the fuel pump and somehow causing it to surge??? Maybe im just crazy, but it was very noticible. I'll report back to you all soon with the results of the unplugged vent line. Thank for all your input. |
Natexlh1000
| | Posted on Monday, March 18, 2013 - 10:23 pm: |
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Wait. They had the tank breather connected to the little nipple under the throttle body?
That nipple is for CA carbon canisters.
One more thing:
The breather is screwed into a tip-over valve on the front of the tank.
It's possible this could be boogered up somehow.
You can unscrew it and take it out of the tank easily. |
Hootowl
| | Posted on Tuesday, March 19, 2013 - 10:42 am: |
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"When Harley Davidson put the bike together, they had the vent line plugged into the air intake?"
No. The fuel vent was not attached to the vacuum port on the manifold from the factory. That would pull a vacuum on the tank, which would hinder fuel flow in the same way that having a plugged vent line eventually would. The fuel being pumped out of the tank creates a vacuum.
If your vent line is attached to that vacuum port, I believe you've just discovered your issue. |
Mrsandman
| | Posted on Tuesday, March 19, 2013 - 10:50 am: |
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This wasn't a factory set up, even though the bike was origionally from California. When HD rebuilt the motor last year, I found that that is where it was plugged in. Definately no a factory job.
But yah, Im going to run that test probably this weekend so i'll post the results soon. Thanks. |
Mrsandman
| | Posted on Tuesday, March 19, 2013 - 08:22 pm: |
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Well, Golly-gee-wiz, that worked...I unplugged the vent line from the air intake and rode to the gas station and filled the tank up and walla! no surging. Finally! All that crazy stuff I did and this is what it came to! just to unplug the vent line.
There is still the matter of changing out my fuel injectors but that will not be an issue at all. Which reminds me, anybody know of a good place to order buell fuel injectors, i've been looking online but it seems they don't exist? Im trying to avoid HD but I will utilize them if I must. Thanks for all your guys continued support. Finally my suffering can bring others joy. |
Mrsandman
| | Posted on Tuesday, March 19, 2013 - 08:33 pm: |
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Anybody know if these injectors will work for my x1 lightning?
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Kevmean
| | Posted on Tuesday, March 19, 2013 - 08:48 pm: |
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Why change your injectors if you have now cured the problem?
I'm a big believer if it isn't broke don't fix it 
Adding some fuel system cleaner to your petrol every now and again isn't a bad idea on any vehicle though as it often prevents problems occuring in the first place. |
Mrsandman
| | Posted on Tuesday, March 19, 2013 - 08:55 pm: |
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It was a dual problem: First it was the spontaneous dying (now solved)
The other is the AFV dropping between 80 and 73. It has been suggested to me (multiple times) I have a leaky injector, which is causing the afv drop and I have been running the greatest of injector cleaners through the tank but it's not doing any good. |
Kevmean
| | Posted on Tuesday, March 19, 2013 - 09:38 pm: |
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But you have been feeding petrol fumes into your air intake instead of nice clean air ...that alone will throw out all readings regarding the mixture and the ecu has been trying to compensate for that.
Run it for a while and see what it settles down at now . |
Preybird1
| | Posted on Tuesday, March 19, 2013 - 09:48 pm: |
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You just need the part number for the OEM injector and punch the numbers into this website to get a 20% msrp discount!
HERE IS THE LINK AND THANK WILSON!
http://www.badweatherbikers.com/buell/messages/476 23/703758.html?1363740934
I don't have a parts book so no number sorry. |
Two_seasons
| | Posted on Tuesday, March 19, 2013 - 10:35 pm: |
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Your AdaptiveFuelValue was cutting some of the fuel via the ECM because of the fuel vent connected to the intake. Not rocket science to understand why your AFV would adjust!
When you call out "HD" you are actually calling out the HD dealer that did the poor workmanship as called out in another thread you started some months ago. Please stop implying that Harley-Davidson had anything to do with this engine rebuild. |
Mrsandman
| | Posted on Wednesday, March 20, 2013 - 12:00 am: |
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Sounds great, i'll run the bike as is and see what happens, Hopefully this situation corrects itself and all goes well.
To clarify, when I mention Harley-Davidson, I mean to imply the dealer who worked on the motor rebuild. I will not use the term "Harley Davidson" loosly from now on, i'll be certain to specify that the poor workmanship came from a dealer. |
Firemanjim
| | Posted on Wednesday, March 20, 2013 - 01:29 am: |
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The other common cause of AFV skewing down like yours is a bad Engine Temp sensor telling ecu engine is cold and it adds fuel while the bike then sees a rich condition and AFV goes down as a result. |
Natexlh1000
| | Posted on Wednesday, March 20, 2013 - 08:10 am: |
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The dealer's name is?
Kinda important to note this sort of info. |
Hootowl
| | Posted on Wednesday, March 20, 2013 - 09:41 am: |
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I'm not convinced that the vent attached to the intake is causing the ECM to lean out the mixture. There isn't really a great deal of air/fuel vapor making it out of the tank. The tank is sealed (hence the need for a vent to allow fuel to be pumped out of it) so the only air/fuel vapor coming out would be what was required to pull a vacuum. That would flow for only a few seconds after startup, then no more vapor would flow. In fact, the fuel pump is strong enough at 55 PSI to suck air out of the intake manifold, which is at most drawing, what, one atmosphere? 14.7 PSI at sea level? So rather than letting fuel vapor in, it is actually sucking air out.
Just a guess, but I don't think this will solve your AFV issue. I hope I'm wrong and your problems are solved though. |
01x1buell
| | Posted on Wednesday, March 20, 2013 - 12:26 pm: |
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I say you put a cao on the nipple under the throrrle body that it was attached to, and ride it for a little while and see what happens,without messung with it anymore. |
Two_seasons
| | Posted on Wednesday, March 20, 2013 - 02:04 pm: |
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I'm with Hoot. Probably not the cure all. Unfortunately for the OP, there were too many things that were wrong with his bike when he retrieved it from the HD dealer. |
Mrsandman
| | Posted on Wednesday, March 20, 2013 - 03:00 pm: |
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Well I rode it around today and it is still having an AFV drop. I do have a fuel injection cleaner in the tank but it hasn't seemed to change anything (thats about what I expected though). Not a huge deal at the moment, considering that i'm making some sort of progress. I'm going to run the rest of the tank of through the bike and see what happens. But as it seems now, it's likely a drooling fuel injector.
FIREMANJIM. ETS is brand new, didn't do anything notable. and the nipple on the air intake is capped off.
So i'll give it more time and see where i'm at. Happy Wednesday! |
Two_seasons
| | Posted on Thursday, March 21, 2013 - 06:01 am: |
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Remember what I said about electrical devices, and that is what your ETS is? "Just because an electrical part is NEW doesn't mean it works properly".
Even spark plugs, dropped hard on the parts counter, may not work correctly once installed. |
Hootowl
| | Posted on Thursday, April 04, 2013 - 05:23 pm: |
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Any updates? |
Mrsandman
| | Posted on Monday, April 08, 2013 - 03:40 pm: |
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UPDATE: So I have been riding the buell around pretty regularly and it seems to be running ok at the moment. It's not dying under load anymore, but i'm still having an issue with the AFV staying at 80?
I know its been recommended that the injectors get changed out, but I feel I should at least change out the O2 sensor (again) first prior, to doing that.
Any idea of how to determine if my TPS is bad? It's not throwing a code at me but I feel if it is bad, that it might be keeping my AFV down?
As far as my ETS goes, prior to replacing it I got a good steady linear temp increase, which led me to believe it was a good ETS, but I got a new one about a month or so ago and put it in with the same steady linear temp increase and no notable performance changes. So i'm led to believe my ETS is good and working fine. |
Hootowl
| | Posted on Monday, April 08, 2013 - 05:00 pm: |
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Measure voltage out of the TPS as you SLOWLY open and close the throttle. You should see a smooth and linear change in voltage. This is easier to see with an analog meter.
Based on what you've told us so far, it doesn't sound like the TPS is bad.
Jeff |
Oldog
| | Posted on Monday, April 08, 2013 - 05:37 pm: |
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Sand man
if the bike is running "ok" what color are the plugs? |
Firemanjim
| | Posted on Tuesday, April 09, 2013 - 01:45 am: |
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Weird as AFV of 80 means that ecu is pulling 20% fuel because it is seeing a over rich condition. ETS sensor will do that, maybe fuel pump regulator could stuff up and raise fuel pressure causing it but not likely.
Bad intake seals,leaky exhaust, etc will cause AFV to go the other way.
What does the learned fuel area of rear map look like? |
Mrsandman
| | Posted on Tuesday, April 09, 2013 - 10:41 pm: |
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Hootowl: The TPS is showing a steady increase, so you are very likely correct. TPS should be fine.
Oldog: I will have to get back to you on the plugs. When I checked them last month to check the gap, they seemed just fine, no burns, chips, oil residue or wetness. But I will look again soon.
Firemanjim: I looked at the fuel pump and regulator, and they are in really good/clean condition, free of debris. My ETS is brand new and seems to be working great, and i'm getting no leaky seals from the exhaust or intake seals (unlit propane torch check) I'll dabble with the ECM Spy and see if I can get you the info for the learned fuel area on the rear map.
Thanks everybody |
Mcelhaney14
| | Posted on Wednesday, April 10, 2013 - 12:45 am: |
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Don't buy new injectors. If you decide they need work get them ultrasonically cleaned. Only costs me $17.50 an injector. Glad to hear you are making progress. |
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