| Author | Message | ||
     Sinjhin |
So, I just took my 1125 out the other day to get it ready for the upcoming season. It has close to 8000 miles on it and I got it with 1700 on it. I have tended the battery once a month up to full charge but it was completely dead.. so I charged it up again. At the end of last season I noticed it revving up the fuel pump more after I shut it off. Which I have read about on here, but found it odd that the frequency was increasing. It also started sounding odd at takeoff. It is hard to describe the sound but basically just sounded like it was running a little leaner than it should be. At first I thought I might have an exhaust leak but that has been ruled out as it only makes this odd noise under load. ie. when I rev the bike in neutral it sounds normal, but when I start slowly I can hear the difference. So, I checked all the fluids and then started it up to warm up the oil and get rid of condensation before changing the oil. It started up just fine and after a fifteen minute ride I brought it back to do the oil change with a smile on my face. When I shut the bike down though, the fuel pump did not sound good. The whirring seemed labored and it was not shutting off... at all. I have read about this problem on the boards as well, but note that the was not the cycling of the pump mentioned before. It was constantly on. After about 45 minutes of it continually running it was starting to wear the battery down to nothing so I unhooked the battery to stop it. I have gotten the error codes P0193 - FUEL PR SYS ERROR - fuel pressure too high, and P0628 - FUELPMP SYS ERR - fuel pump control circuit low. From what I have read it seems that this can be linked to either a faulty fuel pressure sensor or a bad fuel pump. My initial idea was that it was the fuel pump, but if the pressure in the system was already very high I could see it making the pump sound bad as it tried to continually pump more fuel into an already pressurized system. Anyways, I am pretty bummed out about it, but am definately ready to just get it fixed. I mostly posted so that we have one more issue documented, but I would ask if anyone has any ideas to isolate the issue to a specific part before I start ordering. I am pretty poor and the fuel pump looks to be over $400 for just the part itself... so, I want to get the right part the first time. Thanks in advance for any help. | ||
| 1125rz |
Had same problem with mine. Ended up having short in fuel pump . Dealer replaced pump & has been fine since | ||
| Rogue_biker |
My XB12R Firebolt's fuel pump started to act weird at around 15k miles. It would run continuously while riding. I would turn the ignition to ON and instead of the normal cycling of the pump then it would stop, it kept running. I rode it like that for another 2k miles before finally fixing it. I first took it to the dealership and the wrench monkey's in there told me the job would be $1500 because they had to "drop the motor"! Unbelievable! They told me this AFTER they screwed up the simplest job on my Firebolt, which was to reset the TPS. Now I'm supposed to trust them with dropping my motor? NOT! I consulted the Service Manual and there it stated that a malfunctioning fuel pump could be due to a short in the wiring. So they recommended replacing the fuel pump's wiring harness. I bought the wiring harness from the dealership. Then, I removed the fuel pump and sure enough, the wiring was rubbing against the pump's body and that friction shaved the wire insulation off enough to expose the wire and cause a short. This made the fuel pump go into "default" mode and run continuously. The "new" wiring harness from Buell had a thick, protecting jacket around the wires so it protected them from rubbing. BTW, I didn't have to drop the motor to remove the pump, I just needed to lift the rear of the bike via the muffler to drop the swing arm enough to clear the removal of the pump. Thanks to all the BWB members, this knowledge saved me $1500! I spent less than $100 for the new wiring harness. My XB12R Firebolt now has 30k miles on it. Happy ending!  | ||
| Sinjhin |
Thanks for the replies. I will definitely look into the wires to see if there is any wear before doing anything else. I will keep you all posted. | ||
| Rogue_biker |
http://www.badweatherbikers.com/buell/messages/142 838/370305.html?1214580037 Above is the link to the original thread I used for information. It helped me immensely. I did have to have a friend fabricate a fuel pump puller for the Firebolt. That tool is about $100 from the dealership. Others have been able to create makeshift tools. | ||
| Sinjhin |
So, here is a little update for anyone interested. I jumped my bike and drove it over to my girlfriend's house so I could park it on her lit covered porch (best shop I have available). Now I am smoking a cig and drinking some tasty wine, staring at her (my bike, not m girlfriend). Note that when I shut my bike off after the trek the fuel pump did not continuously run. This seems to be evidence to support a wiring short in the fuel pump. Yes? I took off the airbox cover to make sure I had not hurt the fuel rail/injectors during the denoid process. Everything looks fine. I got off the plastic covering of the fuel pump and when I was getting ready to siphon out as much fuel as possible I realized that this was a more in depth process than I expected. I have not figured out a good way to support the bike so I can drop the swing arm yet. I also don't have any idea what I can use to pull the fuel pump yet either. I have a service manual on the way. I am trying to decide whether I want to wait on that and continue or put it all back together and take it to the dealership and pay what is sure to be a phenominal amount to let them fix it. Also, I found another place of wire chaffing. I will post pictures and a description once I use the parts manual to figure out exactly what wire it is. | ||
| Ratsmc |
So, unless you have a known good Buell mechanic, paying out-of-pocket is likely to be pricey and I'm not confident that you won't be paying a mechanic to learn how to work on a Rotax. So, this is a decision-making topic as well as a troubleshooting one. Having been broke myself in the past, I tend to lean toward DIY. That's how I learned to wrench. The service manual will help you. Posting pics here will help people here to help you as well. If I were you in this case, I'd start thinking about a good place to work on the bike. |
