| Author | Message | ||
     Starving_college_kid |
Hi all This is my first time I have ever posted here but I have used this site over the past 3 years of my Buell owning experience and it has been INVALUABLE to me. I did use the search button before I started this thread! I have however run into a bit of a conundrum I am down at college and my roomates 2000 Buell X1 Lightning with 27,000 miles and and slip on pipe has not been running off of the front jug ever since we got it out for the year last week, it had been sitting for 5 months over winter. (thankfully my XB is running top notch!). It has fuel, spark and air.... should run right? bike runs off of rear jug only unless bike is above 4K RPM at wide open then it stops studering and hauls you know what. Things I have checked so far, coil and plug wire resistance is within spec, has good strong blue spark, temp sensor and AIT seem seem normal per ECMspy, did a TPS reset, New Bosch O2 sensor due to rubbed through wires, waiting for adapter from Napa to test compression but front jug feels just as strong as the rear with my finger over the spark plug hole, ran a bottle of Chevron techron fuel system cleaner through it along with a fresh tank of ethanol free premium, swapped the new battery out of my XB into it ( was thinking low voltage may have been an issue), new plugs Everything in ECMspy looks normal with the exception of the front injector pulse width being about a constant .3 M/S higher than the rear injector. After putting in a set of new plugs and a trip around the block about 2 miles results in a fuel soaked front plug. Any thoughts or input of things I should check would be greatly appreciated Im about ready to go crazy!  | ||
| Ft_bstrd |
Check compression maybe. Does the sound change above 4,000 RPM? Checked the ground? Could it be a bad temp sensor kicking it into skip spark mode? Bad plug wire? Intake seal leak? Checked the VR or stator output? Might not have enough juice until you get it spinning to 4,000. | ||
| Kalali |
I would lean more in the direction of a marginal coil and/or plug wires, even a bad spark plug. I've had poor experience trying to indict these components through testing alone especially since affect of temperature variation on these components is unpredictable. If it were mine, I would start with checking ALL the grounds and replace the plug wires. You could switch them briefly to see if you get spark. Next level would be checking the sensors, especially the head temperature sensor, etc. (Message edited by kalali on February 20, 2015) | ||
| Akbuell |
Helped a friend last summer who was in a similar situation. Running on one cyl, would sometimes clear up at higher RPM, checked EVERYTHING to no avail . . . Given what you have tried, and the things you have checked, try swapping the fuel injectors front for rear and see if the problem follows. A dirty fuel injector will spray a stream of fuel, not a mist. The stream of fuel will give you a wet plug; won't burn/will burn poorly. An easy check, eliminates coil/plug wires/timing issues. Hope this helps, Dave | ||
| Buelliedan |
sounds to me like your ecm is going bad. Perhaps you can borrow a known good one and see if it changes. | ||
| Steveford |
Pull up that spark plug boot and see what it looks like under there and also check to make sure it hasn't rubbed through somewhere. That plug may not be able to clear itself so chuck in a new one, they're cheap enough. | ||
| Two_seasons |
Engine Temp Sensor. Order it here... http://americansportbike.com/newdir/Item/17035 You may also need this... http://americansportbike.com/newdir/Item/16140 | ||
| Starving_college_kid |
Thanks so much for all the fast responses, I swapped the injectors and the misfire followed the injector. So looks like il be looking for a new injector! I have read that PT cruiser injectors are the same??? Thanks so much for the help so far!!! | ||
| Akbuell |
Excellent! Glad you have found the problem. And you are welcome; glad that we were able to help. And thank you for the feedback, helps increase the 'community knowledge'. Don't know about the PT cruiser injectors. FWIW, I believe the TPS is a FoMoCO product from an FI 5.0L Mustang, and the cyl size of a 5.0L V8 is 625CC, so that may be a source or crossover part. | ||
| Kalali |
Great. I wouldn't have even guessed a faulty injector cause symptoms like that... There is no substitute for real experience  | ||
| Starving_college_kid |
Have any of you had a professional injector cleaning done where you pull the injector and ship it to them for them to clean? There is a company in Portland that does it for 20 bucks an injector. Akbuell i have been doing research on the 5.0 injectors if I went this route would you recommend replacing both the front and the rear injector and shimming the hold down clamp to accommodate the taller 5.0 injectors? Or would you recommend searching for a used sigma injector? Thanks again! | ||
| Akbuell |
Have no idea if the 5.0 ones will work. Just a thought about a possible crossover. For $20 each, I would send them both out for a tune and service. Or 2 new ones, and then keep the rebuilds as spares. Last time I bought some, they were $60ish each. Probably in the $70 range now . . . | ||
| Buellracer01 |
Just recently took my injectors to a place here in Houston. My injectors were flowing well but they cleaned up the spray better and replaced my O rigs. I would highly suggest it, I'm rebuilding my bike right now and the main reason I had it done was my bike has been having some of the same issues you described and I wanted to rule the injectors out as a source of the problem while I had them out. | ||
| Mcelhaney14 |
I've had my injectors cleaned before and it worked great. However, both of mine were still working. If yours is clogged they could probably help but if it isn't pulsing I'm not sure. | ||
| Starving_college_kid |
Both injectors are pulsing however the "bad" injector has a higher pulse width. I went down to the local NAPA and they where kind enough to let me take home a bucket of injector cores to compare to mine. But to no available closest one out of the bucket in terms of resistance was ford 5.4 injectors but I have no idea what they flow. prob a little big each cylinder would be 675 CC but its a mute point because they where physically to big. I called around to all the HD dealers close to me and everyone was 1-2 weeks out. I think I will just box mine up and send them to doctor injector in Portland. Thanks again everyone | ||
| Littlebuggles |
Had my XB injectors rebuilt and by a local company here in Salt Lake and they did a great job, so yeah, recommended, though i wonder what they are doing to it for just $20 per. Mine were twice that with new filter screens, o-rings and a carbon and glaze cleaning as well. | ||
| Robertb1958 |
My X1 came to me with the wrong injectors in it, somehow. Getting cleaned and flow bench verified injectors got my bike running great. It sounds like one of yours might be sticking open - too much gas until high rpm's? Might want to check out my threads from last year for injector model number and data. I still have a spare set that were cleaned and verified. They are Bosch and flow 6% lower than stock, but ran well with the AFV up a little. Trade for a 6pack of good beer. The ones that came in my X1 are now in the trash! | ||
| Starving_college_kid |
Just thought I would give everyone an update on my injector issue. I sent both injectors off to get cleaned and just got a call from the guy. The "good injector was flowing 330CC a min and the "bad" injector was flowing 500CC a min. Can any of you recommend a good place to to buy a new injector? They cannot reduce the flow of the 500 CC injector said there was a place in California that could but at this point I would rather just replace with a new one. all the dealers around here are out 2-3 weeks for a new one... Thanks again for all the help! | ||
| Starving_college_kid |
Just ordered a new injector from a HD dealer in California $97 bucks all said and done. Apparently it is the same injector used in 03 XB9's (2003 only XB9's) according to the parts dep. guy. So fingers crossed it will be the correct injector! | ||
| Starving_college_kid |
Problem is fixed! bike is running great threw the new injector in this afternoon and took it for a test spin and all is good. The part # for the injector was p0786.02a8. Thanks again for all the help everyone! | ||
| Natexlh1000 |
That's funny that the bad one flowed too much. | ||
| Kalali |
Glad it's all fixed. So the explanation is the injector was putting out too much fuel and the spark couldn't keep up? The part I'm still a little confused is that the front and rear injector pulse width can be easily separately modified using ECMSpy. So technically one could adjust the pulse widths between the front and rear to match. Isn't that what we do when we adjust the fuel to match our exhaust/intake or I'm totally missing the boat? | ||
| Starving_college_kid |
Yes Kalali for some reason the injector was screwed up and dumping fuel faster than the engine could burn it at low RPM. It was flowing 500 cc as compared to the "good injector" at 300 cc at the same pulse width. I never thought about messing with the pulse width. But in ECMspy the "bad injector" was only .3 M/S higher than the "good injector". I didn't think that would make the injector spray 200 cc more. So I just elected to replace the injector and now all is well! Maybe I should hook ECMspy back up just to see what the pulse width is now just for fun! |
