| Author | Message | ||
     Hughlysses |
My son-in-law picked up a used 2008 1125R from a fellow Badwebber over the weekend. The bike had been running ~2 years ago but the PO had been unable to start it afterward (battery on battery tender and in good condition). My SIL got the bike home last night and quickly found the fuel pump was not running, but the bike would fire off when he sprayed throttle body cleaner into the intakes. He pulled the airbox off to poke around under it and didn't see any wiring issues. He tried the carb cleaner in the intakes again and all of a sudden the pump kicks on and the bike keeps running! He let the bike run a few minutes, then shut it down. He puts the airbox back together hoping to take the bike for a test ride, but when he tried to start the bike again- no fuel pump. He pulled the airbox back off and tried wiggling wires under that with the key on but still no fuel pump. As far as I know he didn't find any issues there. I suggested he check the fuel pump electrical connector under the seat; it was fine. When I last talked to him last night, he was going to check the fuses and relays. Any suggestions on what his likely issue is? Bad fuel pump? Wiring issue? Bad ECM? | ||
| Terrys1980 |
How many ground wires are connected to the battery? There should be two. I had a similar issue the other day. I pulled my battery out and when I put it back in I forget the smaller ground wire and it was tucked beside the frame making just enough contact to to cause intermittent problems. After connecting the second ground it was solid. | ||
| Nobuell |
How can he tell the pump is not running? I would go into the diagnostic mode on the control panel and check the pump pressure first. If the proper pressure is indicated, the pump is likely OK. It does cycle on and modulate based on the fuel pressure. I would not trust the battery if it has been sitting on a tender for two years. You may want to install or connect a known good battery. How bad is the fuel that has been sitting in the tank. The injectors could be fouled from the two+ years of sitting. The injectors may need to be removed and cleaned. It may not hurt to remove the old fuel and install fresh. The plugs may be fouled from the cleaner stayed into the intake and from the old fuel. They may need to be replaced. The rear plug is easy, the front will take a bit more effort but can be done by removing the snorkel. Those are my first thoughts. | ||
| Hughlysses |
Thanks for the input. Nobuell- He said when pump was running with airbox off he could feel fuel lines pulsing. Now, no initial "whir" sound when key is turned on and no pulsing as engine cranks. Still, it's a good idea to go into diagnostic mode and see what's indicated. Engine turns over fine so battery is apparently OK. Fuel may be nasty but since bike ran on it's on for a while it seems unlikely the injectors are clogged. I suppose it's possible the fuel pump wasn't running, then it was running, which pumped nasty fuel into injectors which quickly clogged them. Plugs are not fouled (at least not badly enough to keep the bike from starting) as bike will still run on TB cleaner. | ||
| Nobuell |
Running and running correctly are two different things. A low battery may have enough voltage to start but not enough to run the ignition or other vital components. Running on TB cleaner to does not necessarily mean the injectors are working. It should be noted that the pump may indeed stop when up to pressure. I like to try the simple first. 1, Make sure the BAT is up to par. The bike has been sitting for over two years. 2. Who knows how long the fuel has been in the bike. My track bike stored over the winter starts and runs funky until fresh gas is run through it. 3. It does not take much to clog injectors. The orifices are very small. If the PO is honest and the bike ran prior to storage, I would not expect static components to just fail. With that said, stranger things have happened. The fuel pump pressure can be viewed in the panel diagnostic mode. That will tell what is going on with the pump, at least while it is cold. | ||
| Niceguytac |
Fuel errors include p0628, p0087, p0193, p0506. There are other errors but those are the first 4. Put a voltage tester on the battery it's reading 12 volts. Grounds are firmly set. Haven't had time to do anything else cause of work. Found the trouble shooting trees for the codes so I'll start doing that ASAP. | ||
| Nobuell |
12 volts indicate a 25% charge. 100% would be 12.7 volts. The highest priority DTC of those listed would be P0087 (Fuel Rail Pressure). That DTC could be a result of running out of gas or a failed pump. The first thing to check is the pump pressure. If you are getting correct pressure, then the codes may be old and not applicable. I still suspect the battery may the issues in combination with old fuel. P0628 indicates a low circuit, but that could be a low voltage issue as well. Good luck. Also, if it turns out to be the pump, it can be replaced without the swingers removal. Jack up the bike, remove the bottom shock mount and loosen the axle to relieve the belt tension. Than should let the swing arm drop down enough to remove the pump. | ||
| Mhpalin |
If it is the fuel pump you can get one on e-bay they work great. http://www.ebay.ca/itm/New-Intank-Fuel-Pump-for-Bu ell-1125-1125R-1125CR-2008-2009-/271223281251?pt=M otorcycles_Parts_Accessories&hash=item3f262ad663&v xp=mtr&_uhb=1 http://www.ukbeg.com/forum/viewtopic.php?f=17&t=57 94 | ||
| Hughlysses |
^ ~$20 shipped? Now THAT is a deal! | ||
| Mhpalin |
yes it's a great price the shipping to me is more then the price of the pump. It gives me 450 not running 410-420 at idile | ||
| 1313 |
Hugh, Do your SIL a favor. Put an XB fuel level sensor on if you replace the fuel pump or if the original pump comes out. My $0.02... 1313 | ||
| Hughlysses |
1313- "Niceguytac" above is my SIL and the bike owner. This is Mikethebike's former 1125R. What's better about the XB sensor? | ||
| Mhpalin |
It's the same sensor as the 1125 but you can't get a part # for the 1125 on Al has them http://www.americansportbike.com/shoponline/ccp0-p rodshow/17490.html | ||
| 1313 |
What's better about the XB sensor? It's kept my 1125CR's LFL behaving properly. More info from the originator: Page 1 Page 2 Page 3 Others have done it with similar success, as well! I had assumed it was MTB's former 1125R that was being discussed, 1313 | ||
| Hughlysses |
Interesting. Sounds like a good, cheap mod and easy to do while the fuel pump is out. | ||
| Niceguytac |
So update I ordered the 20$ fuel pump and started the tare down. I got the pump out and tried to direct wiring just to be sure. It worked just fine. Back to the drawing board pulled out the wire tester and found no continuity on the power wire. The problem being in the plastic housing that separates the inside wires to the outside wires. You can't buy that part apparently so I'm in the process of making it. I'm sure there won't be a problem with it just need time to get it finished. I'll keep everyone posted. | ||
| Nobuell |
I had the same failure on my 1125R. The power wire is an open circuit in the epoxy. I believe that there must be a weak solder joint and perhaps when the pump ages the current draw causes failure. I excavated the epoxy and was able to early re-solder the lead. I had to sacrifice the fuel sensor leads but it was for my track bike. I also installed one of the low cost pump kits that can be found on the internet. It did not produce the proper pressure. A waste of time. I had Al at American SportBike send me a new one and that solved the issue. | ||
| Hughlysses |
Quick update to this thread- new factory fuel pump assembly installed last weekend. After a little difficulty (low battery, possibly a loose vacuum line) bike fired up and is running fine. | ||
| Nobuell |
Good deal |
