| Author | Message | ||
     Mt_bueller |
I have an 2006 Ulysses, I've had it since 2007 and It has 14,000 miles on the clock. Up until recently it has always run pretty well, it's always had a slight surge to it when in town at about 25 to 30 mph in a no load state (I mean the area of the throttle that falls between deceleration and acceleration). It has always been an irritant but nothing more. Last summer it started getting much worse, it would surge to the point that you could call it "bucking" as if it was misfiring. I took it out and ran it real hard for 20 to 30 miles, when I got back to town it ran smooth as glass. I thought maybe one or both of the plugs was starting to foul so I put a new set of plugs in it. Nothing changed. I have a copy of ECM Spy, it is a software program that lets you get into the ECM and will allow you to reset the TPS, view trouble codes, do diagnostics on the system. I used it to reset the TPS and run diagnostics on the system, I also used it to test the coils, they checked out OK. I took it out today (it's about 50 degrees out) and a couple of times when starting out I thought that it was going to die. When it "bucks" it is very abrupt, like the engine died and then starts up very abruptly, so much so that it lunges forward if you pull the clutch in it will drop down to an idle and tick over just fine. It only does this around 2,000 rpm, if you get it higher than that it pulls very strongly. In town traffic it leaps and surges to the point that you have to pull the clutch in or accelerate. I'm at a loss as what might be causing this, I'm hoping someone else might have an idea. Sorry about the long winded post but I thought to accurately describe the problem the length is necessary. Any ideas would certainly be appreciated, thanks for you help. Don Cameron | ||
| Panhead_dan |
It could be several things but sounds exactly like it needs a tps reset. I know you did but maybe missed a step? I found a couple of youtube vids very helpful the first time. | ||
| Teeps |
Make sure the battery is fully charged and is in good condition. Make sure the battery cables and terminations are secure. Fresh fuel. Inspect, clean or replace spark plugs. Inspect plug wires. Then ride the bike until the fan comes on. Then while engine is at operating temperature. Do a TPS reset. Reset AFV to 100% | ||
| Mnrider |
You can spray soapy water on the plug wires with the engine running to test the spark plug wires. | ||
| Nillaice |
the fuel pump wires on my uly had me scratching my head for a while http://www.badweatherbikers.com/buell/messages/142 838/442427.html | ||
| Mt_bueller |
Thank you all for the replies. I'm going to do a TPS reset and hopefully I just didn't get a proper reset the last time I did it. I'll post the results when I get to do the reset, the weather is gone into a stormy cycle right now so it's going to be a few days before I can do the reset. Thanks again Don | ||
| Firemanjim |
And do not forget the intake seals, age and mileage point to them--- they are a maintenance item. | ||
| Ftd |
Add a ground wire from the battery ground to the coil. It can't hurt and it really improved the drive ability of my '06 Uly. YMMV | ||
| Mt_bueller |
Well I finally got to do a TPS reset, the weather finally cooperated. I was surprised to find out that I hadn't done a good job on the las reset that I did. It appears that was what was wrong. I was surprise at the difference between a cold reset and a hot one. Teep's comment about making sure the engine was at operating temp made me curious. I first reset it cold and rode it, it was much better but still had a little surge to it. I rode it long enough to get it to operating temp and then checked it, to my surprise when I backed off the idle screw to where it wasn't touching the throttle plate I had .4degree throttle plate opening. I reset it and rode it again, now it runs great. Thanks so much for your help. Don | ||
| Teeps |
Mt_bueller Posted on Thursday, March 31, 2016 - 05:58 pm: Well I finally got to do a TPS reset, the weather finally cooperated. I was surprised to find out that I hadn't done a good job on the las reset that I did. It appears that was what was wrong. I was surprise at the difference between a cold reset and a hot one. Teep's comment about making sure the engine was at operating temp made me curious. I first reset it cold and rode it, it was much better but still had a little surge to it. I rode it long enough to get it to operating temp and then checked it, to my surprise when I backed off the idle screw to where it wasn't touching the throttle plate I had .4degree throttle plate opening. I reset it and rode it again, now it runs great. Thanks so much for your help. Don Glad to hear you have it sorted. My thought: how long does the engine run cold... not very long. So it makes sense to do a critical adjustment that could be affected by heat with the engine hot. Apparently you have further proved this by your observations. Cheers! |
