| Author | Message | ||
     Carl |
So I got the charging system fixed on the bike, turned out to be a rectifier. While I was working on it, I cleaned up the harnesses that connect to it, and everything is fine with that. Now I'm experiencing a new problem. I'll be cruising down the highway at around 60 - 70 mph and my bike will lose a bit of power for second and come right back on. After it does this a few times, the check engine light comes on. The bike sat for a while obviously, as its a 2000 with only 6700 miles at purchase. I put about 200 miles on it in the last two weeks and it has been doing this all the time at cruising speeds. The other day I was riding it and it just died completely and left me stranded. I was listening for the fuel pump when I turned the switch up and down but nothing happened. So I pulled the relays out, switched em, and still nothing. Then a couple minutes later it worked. So I got the bike back home with no problems whatsoever. Now I'm having this loss of power problem instead of being totally dead. When it does it, if I throttle up it pulls nice, but I can tell its a little bit lean by the sound of the engine. If I close the throttle and coast down to speed a little bit the check engine light goes off. What do you guys think this is? I was thinking a possible plugged fuel filter causing the fuel pump to overheat and shutdown, or just a bad fuel pump. Any ideas? | ||
| Bald_bueller |
could it be your tank vent hose?? have you checked that | ||
| Wile_ecoyote |
I have had very similar situation occur after sitting for awhile. I have found in my case the sidestand switch was not making as good as it could be. Especially after I would hit a bump in the road. I sprayed contact or even brake cleaner through switch and it seemed to go away. I think it does this more often after sitting after a bath. I think maybe it collects water then becomes fouled with corrosion. Try that first. Seems weird I know but thats what did me in. Please let us know what you do find. | ||
| Littlebuggles |
Fuel filters are cheap. Learned this with my cars, there's no shame in changing one out, even on a hunch. Others have suggested stopping and opening you fuel tank to see if you're getting a vacuum in there due to a plugged breather line too. | ||
| Torqd |
I would second the sidestand switch... | ||
| Jos51700 |
Check your battery cables first. Tank vents and sidestand switches don't throw codes. | ||
| Jos51700 |
"but I can tell its a little bit lean by the sound of the engine" What, precisely does a lean engine sound like? It does sound like you need to check your AFV before making a guess like that. | ||
| Ratbuell |
Could be a fuel pump on the way out, too. Usually electric motors just quit, there's no gray area...but could be getting wonky on ya. (disclaimer - both my tubers are carb'd, sorry if it's no help!) | ||
| Jstfrfun |
There have been cases of intermitent before complete failure of fuel pumps(if thats what you mean by "wonky")in other applications, Not sure about this one but I would definately look to the less expensive avenues first ie: fuel filter, clogged breather ect. It might also help to get a plug reading at the time of incident. | ||
| Carl |
You don't know what a lean engine sounds or feels like Jos? lol... Slight decrease in power followed by a few 'pings' before it cuts out. I'm going to pull the side panels off tomorrow and change the filter and see if it helps any. I did notice today, that it only does it after about 20 minutes of high speed riding, it will not do it when its cold. | ||
| Preybird1 |
Hey carl i had this same exact problem i went through the bike, And found the following problems... Bad rear temp sensor, Put new one in still same prob. Found out front cylinder intake seal was bad, Fixed that same prob, Shorted out o2 sensor fixed that same prob, You know what it was, It was the ECM!!! But i was the fourth owner of this bike and i think thats why im the 4th owner. So i replaced all these parts for my own peace of mind to know for a fact its all new equipment. An extra ecm would be nice if ones handy-see i got a brother who lives 3 blocks away and he was nice enough to let me try his parts. So we swapped fuel cells to see if it was the pump as we had no pressure tester. And we knew his cell worked fine so we tried it out, rode around same prob. Put on race intake k and n tried it out same problem, Then we used the RACE ECM and wham sweet success. pulled out old ecm and the whole thing smells like a burned out electric motor. So we ran ecm spy on the old ecm on the bike and the volts to o2 sensor input were all kinds of crazy and fluctuating at high throttle the volts spiked then totally disappeared. And the bike did what yours is doing sputter no power light comes on then after slowing light would go off. And this great idea of the input volt test to ecm is CREDITED TO (OLD DOG) old but wise. As we had a little talk of how all my probs happened when my o2 sensor was left loose. Well it shorted out the ecm....And when we tested the race ecm it didnt even fluctuate like the old ecm at idle it was very constant i think i only counted 1 minor blip in voltage....... Go figure. You really need a factory manual and ecm spy and ecm cable.  | ||
| Bad_karma |
Don't rule out the ignition switch but it is pricey so be conservative with you troubleshooting techniques. Joe | ||
| Carl |
Changed the fuel filter today and took it for a little ride, no check engine light, but some slight hesitations. When I took the old filter off, i blew thru them both, the new one was very free flowing, but the old one was sorta tough to blow thru. Where do a get an ECM spy cable at? (Message edited by carl on September 24, 2008) | ||
| Bald_bueller |
check ebay i got mine there guy was very fast at shipping |
