| Author |
Message |
    
M1combat
| | Posted on Saturday, July 15, 2006 - 08:22 pm: | 
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Was riding down I17 today... Bike ran great for 100 miles. Got to Phoenix and took an off ramp. Worked fine at the red light. Took a left hand tun and it worked great until I got over the bridge then it just plain died.
Rolled into a Denny's parking lot and let it cool down. Started it. It'll fire every once in a while but will not "idle" coorectly. If I start it with a good deal of throttle it'll start and rev up, but as soon as I let it drop it'll die unless I give it large ammounts of throttle. I got it to my GF's house by using "un-neccesary acceleration" and then letting it die and coasting for a while, then re-starting it, running it to about 70 at full throttle and then letting it die again. It seems to work just fine at high throttle openings. Nothing at lower openings. Like it'll only deliver fuel in the open loop mode sorta...
Looked at the plug wires (because I just replaced the rear one) and it seems fine. Checked the battery connections, they're great, opened the tank, there's plenty of fuel, fuel light isn't on, oil is a little low but not enough to worry me, no engine light at all, fuel pump doesn't seem like it's loud enough... makes a pretty weak sounding whir when I turn the key/switch on, normally is fairly loud. Checked the connection to the fuel rail, it doesn't seem like it's leaking or anything. Bike seems to turn over "ok" but it does seem like it takes a little bit to get it to fire until it's in the upper RPM range. Like I said, in the upper range it runs great.
My thoughts...
Fried ECM and won't work in the closed loop mode.
Bad Battery
Bad Fuel pump
Bad injectors
Something with the new plug wire (it's "too long" and from a tube frame bike, but it snaps on just fine and it "oughta work")
Any thoughts?
I'll look into it some more tomorrow morning and I'll get back to this tonight. Thanks in advance  .
Small correction... I said it seems to run good in the upper RPM range... That's not quite true. It runs great at most RPM ranges, but only at large throttle openings. |
Diablobrian
| | Posted on Saturday, July 15, 2006 - 09:13 pm: |
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Sounds like a bad sensor, maybe the o2 sensor? |
Hammer71
| | Posted on Saturday, July 15, 2006 - 11:12 pm: |
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Quick guess would be the wires you put on there. Try putting old ones on again. Or just reverse everything you have done recently and start from there. If it clears up your all set if not you know it's a different issue also when was your last tps reset? |
Brineusaf
| | Posted on Sunday, July 16, 2006 - 02:34 am: |
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If it's mostly at idle I would be suspicious of the TPS.
Throwing any codes? |
Nasty73z
| | Posted on Sunday, July 16, 2006 - 06:06 am: |
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This might sound stupid but did you adjust the idle? Figured you probably had but just make sure it's 1050-1150 rpm. |
M1combat
| | Posted on Sunday, July 16, 2006 - 01:34 pm: |
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I don't believe it was the wires... They worked fine for 100 miles plus a few little jaunts the day before. They seem to be secure and not damaged.
The O2 could certainly be damaged... Any way to test?
Not throwing any codes.
Idle is good.
I'm headed up north now and won't be bakc until later tomorrow... Thanks for the rplies so far. please keep them coming. |
Bcordb3
| | Posted on Sunday, July 16, 2006 - 02:46 pm: |
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Don, if you have any problems going north let me know. I'll do my best to assist you. |
Buellfirebolt31
| | Posted on Sunday, July 16, 2006 - 05:01 pm: |
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WHO CARES?? NO one needs closed throttle anyways!!! no just playing.. hope you get it fixed so you don't miss out on good days of riding |
Blake
| | Posted on Monday, July 17, 2006 - 01:21 pm: |
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I agree, first thing to eliminate from the suspect list is whatever you most recently changed on the engine. Reswap the rear plug wire. If that doesn't turn up anything then check...
spark plugs?
inspect/clean injectors?
intake manifold air leak?
TPS? |
M1combat
| | Posted on Monday, July 17, 2006 - 11:28 pm: |
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I let it sit for a day and it seems to be running fine now...
I'll need to head North tomorrow and I'm going to take the bike along with a few bottles of water. I'll look over everything before I go but I just started it earlier and it seems to be fine. I'm sure what will happen is that as soon as it gets hot again the problem will resurface. No engine codes at all. I let it idle for a good three minutes or so, revved it a little, shut it off, started it again, let it idle... Seem to work flawlessly ATM.
The only thing I've had fail like that before was a coil on an old Mustang... Get's hot, won't work, gets cool, works great... I just hope it'll last long enough that it'll get me 100 miles tomorrow.
Thanks Bill... Maybe post a cell number or something? Mine is nine two eight, for 2 oh, nine 3 oh three (broken up to combat gathering bots). I'll probably leave here about six (phoenix). If it gives me trouble on the way to Prescott I only need to make it to Cordes Lakes as I have a friend that can keep it there for a while.
I have a feeling it'll get me all the way to PV with no trouble and then die at a light just like it did on the way down. I'll let it cool down and try to get to Prescott. I have a friend in PV as well.
In any case, I have a feeling it's a coil, fuel pump, or FP regulator. The fuel pump just isn't sounding right.
24K miles just for the record.
\EDIT -
To clarify ... I headed North to Holbrook yesterday for a funeral. Didn't take the bike.
(Message edited by M1Combat on July 17, 2006) |
Odinbueller
| | Posted on Wednesday, July 19, 2006 - 08:43 am: |
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Just to clarify, th O2 sensor has no effect on idle. The bike runs off of preprogrammed maps on the ECM at idle under open loop mode until about 2000 RPM. When was the last time you reset your TPS? Symptoms sound much like the TPS is sending poor data to the ECM. Could also be an ET sensor. Bad ET sensor sends bad input to the ECM and the the ECM makes the bike run poorly. Remember, as engine temp goes up, ET voltage goes down, so you can try monitoring that too. If it were fuel system related, you would notice poor running across the entire RPM range, but a fuel pressure test wouldn't hurt either.
Hope this helps.
Chris |
M1combat
| | Posted on Thursday, July 20, 2006 - 02:22 pm: |
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Alright...
As I said I let it sit for a day and started it... It ran fine, revved fine etc... Perfect...
Decided to try to make it home wednesday morning. Got stopped by a Phoenix motorcycle cop for 87 in a 65. He was nice enough to write it for "85+" in a 65 so it's not felony and I can do traffic school... Yay .
As I got done with the cop I hit the starter and it would make a sound similar to a car when the battery is dead... Not good of course. Wouldn't start. The cop walked back over to me and asked if the starter was "stuck" and I said it must be something like that and hit the button again. Started right up and I left. A few miles later the engine light came on and my gage pod quit working... My LED's were still on (High beam and blinker led on the gage pod) but were dim.
I decided my stator must have gone bad...
It got me down the road three or so miles to care free Hwy and I pulled into a Chevron. Shut it off and hit the starter and no go. Less juice than before . Very strong smell of burnt Mobil-1 75-90 gear oil...
Bad stator I me thinks.
So... Spent 13 hours at the Chevron station talking to the various homeless people and tweakers that stopped by, watched a lot of very nice skirts, answered umpteen million Buell questions (finally got the head scratching, bewildered, confused look with the "What the hell is going on there?" situation). All in all I'd say it wasn't a bad day aside from the ticket and a little sun burn I suppose. I met some neat people and at least four people who had never heard of a Buell have now. A ton of people now know why a perimeter mounted brake both looks cool AND works well .
Anyway... I think I found the problem but I'll be taking it apart soon and I'll confirm as soon as I can. |
M1combat
| | Posted on Thursday, July 20, 2006 - 02:26 pm: |
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It's somewhat funny that you ask about the TPS BTW... It's a race ECM that I got from another badweb member. I installed it and the bike ran perfectly once the AFV was settled. I never reset the TPS. A while back I was having a stumbling issue and took it to Chandler HD. They were supposed to set the TPS (and charged me $40 to do it) but brought the bike back to me w/o setting the TPS but told me it was within spec. I asked to see the DT print out and the guy showed it to me. It seemed to be in spec...
It's still never been set. The guy at Chandler HD kinda pissed me off by charging me $40 to go test ride my bike and hook a DT to it and do nothing. I'll buy a DL setup and do it myself... I don't "think" it's the problem in this case though. |
M1combat
| | Posted on Sunday, July 30, 2006 - 11:09 pm: |
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It was the Stator. Fried like a big bug after 14 seconds in a bug zapper. I replaced the battery as well. |
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Starts but won't idle, works "ok" at higher RPM.