| Author | Message | ||
     Johnnylunchbox |
Stock 2001 S3T, about 3500 miles or so, new ECM about 1500 miles ago. Best way to describe it is if I am riding along and just close the throttle, the bike burbles, almost like quiet backfiring, and the bike won't coast smoothly. In other words as I'm engine braking it feels like it's bucking a bit. Otherwise it runs fine, just this weirdness when you chop the throttle. TPS reset maybe? | ||
| Essthreetee |
Yes TPS reset, this is supposed to be done when ECM is changed. (Message edited by essthreetee on August 11, 2006) | ||
| Johnnylunchbox |
Essthreetee - dealer (Danbury, CT) did the ECM change and I figure they did the TPS reset. Maybe not. Who knows? Thanks for the reply. | ||
| Essthreetee |
OK, I just re-read my original post. I do not want to sound like a TPS reset will clear up your problem, I don't know. I am not a mechanic. What I meant by my first post was that it is my understanding that when you change the ECM you must reset the TPS. I had the same issue with a dealer, where I even specifically asked for it to be reset and it was not. Instead it was checked. I have since purchased the software from Daves @ Appleton and do my own. Hopefully that is all it is...Good luck. Jason (Message edited by essthreetee on August 12, 2006) (Message edited by essthreetee on August 12, 2006) | ||
| Bad_karma |
johnnylunchbox Some other things to consider. Map in new ECM if problem started with install? Check mechanical install of ECM. Also check the primary chain adjustment? Just ideas. Joe | ||
| Oldog |
JL other rough running problems you may need to reset AFV and allow the ECM to learn the bike. drifting / failing ET sensor [rich mixture] Drifting O2 sensor bad exhaust grounding [bad o2 signal] possible rich mixture, as I understand it "burbling" is caused by rich F/A mix.. | ||
| Johnnylunchbox |
Thanks for the replies. Oldog, how do you reset AFV? Also, what is a good replacement O2 sensor. I seem to remember it being an off-the-shelf part? | ||
| Essthreetee |
You can use a Bosch 02 sensor, part # 12014, I just got one from Autozone. $21.49 out the door. Wire is just a little bit longer, but it works. I think to reset the AFV, a dealer must do it unless you have the software. JW | ||
| Oldog |
I have the software vdst or what ever, it is called. call up resets and click, you should then find a long straight road where you can drone about 20 minutes to allow the system to "re-learn" the AFV [ note running out of gas will cause the ecu to get stupid,] If you own a tuber(FI) or an XB its well worth the money, Also its actualy a little cheaper now too IIRC, laptops are about $500 ~ $600 usb adapter ~ $50 Daves or AL American Sport Bike have the software,(American Sport Bike has the keyspan)[not all usb to serial units work, i have 2 that don't] Buellistic indicated that with the battery disconnected shorting the power inputs to the ecu would effectivly reset it, I am not familiar with how the ecu retains info, shorting the ecu with the battery connected may burn up the harness, so YMMV | ||
| Johnnylunchbox |
I think I'll treat myself to the software over the winter. With 2 EFI Buells in my garage it'll probably be worth it over the long haul. In fact my XB is stuttering a bit too, and could probably use a TPS reset. | ||
| Naustin |
I hate to hijack this thread, but I have a similar issue with the `01 S3T I just bought. It sorta gargles/burbles during decel with the throttle closed. It's just like Johnnylunchbox describes in his first post. The bike has been sitting for over 2 years. It ran rough when I first started it, but once warm it seemed fine, except for the burbles. I was a little worried about it, but I'd done a little homework on the S3 so I wasn't really surprised and figured it just needed a computer reset and maybe a new 02 sensor...The dealer wanted me to run a couple of tanks of good gas through it, and then bring it back to them if it doesn't clear itself up. I trust the dealer, and I know they'll take care of me. Small town/know them/etc. Anyway, it has a Pro-Series pipe on it as well. If it had the stock can, I'd figure it just needs a new 02 sensor, and reset the computer and TPS. So, my question is -does the pro-series require the race kit? Thanks! (Message edited by naustin on August 14, 2006) | ||
| Essthreetee |
Does it have the Race ECM??? I THINK (keyword here is think) that the race can needs the race ECM or powercommand. Might be a good place to start???? | ||
| Naustin |
Yeah, that's what I was worried about. I don't know if it has the Race ECM or not. Can anyone confirm if Essthreetee is correct, and if so, is there a way I can identify the race ECM just by looking at it? | ||
| Naustin |
Johnnylunchbox - Just curious - when you bought your bike, you had a stumble at 3,000rpm. Did injector cleaner help at all? You also said you have a new ECM - do you have the Race ECM now then? My bike is peaches at 3,000 revs, but it has your same burble down low... | ||
| Phonemanjustin |
The race ECM's have "Race Use Only" printed on them. | ||
| Johnnylunchbox |
Naustin - I tried the injector cleaner and it didn't help. They finally replaced the ECM and now it runs fine, with the exception of the burbling at closed throttle. I had the stock ECM, and replaced it with stock. | ||
| Naustin |
Johnnylunchbox - Ok, interesting. I checked the bike and I DO have the Race ECM. Besides the closed throttle burble, my bike has a bit of a miss and a cough in it too occassionally... So, I think I've got more than one issue. Nick} | ||
| Phonemanjustin |
Intake or exhaust leak? | ||
| Naustin |
Possible... Its going back to the dealer tonight. I'm just glad it already has the Race ECM to go with the Pro-Series Exhaust. That should mean a TPS reset, one of the sensors, or possibly that intake or exhaust leak should really be the solution. Would the intake/exhaust leak account for the occasional miss/stumble as well? I used to have a blast - they were notorious for intake boot failures. Pretty much any time you had anything wrong with your Blast, you replace the intake boot. If that didn't do it, you replace it again and be extra careful. If that still didn't fix it, you start asking questions...  Are the Tubers the same way? Do they have weak intake manifold couplers?? JohnnyLunchbox - have you had any luck fixing yours yet? I'll let you know what my dealer finds out about mine... (Message edited by naustin on August 15, 2006) | ||
| Oldog |
IIRC recommended replacement of the intake seals is "a couple of years" as was related to me by some of our more experienced badwebbers, My bike exibits all of those and back fires from time to time, its been in the shop in the past and they did not find it they replaced the ecm. just now its due plugs, a battery, and a fuel filter. look in the kv, i believe that air leaks are easy to check for, if your intake seals are over about 3 or 4 years I would change them, its not too hard My bike is peaches at 3,000 revs, but it has your same burble down low... that is just above where it transitions to the o2 sensor for mixture control. some other odd bawls, trouble light no code the the side stand switch, the bike will act up randomly, up to shutoff for no reason. I bypassed the switch for now much better, still burbles at ~ 2700 rpm I attribute some of that to being on/off the ie.. map//o2 sensor//map//o2 sensor etc..... | ||
| Phonemanjustin |
When the exhaust was loose on my X-1 it would have a high idle when you were coming to a stop like 2500 rpm and would slowly come down to normal. It would also miss or backfire on the highway when I hit a bump so I bypassed the sidestand switch and that fixed that. To check for an intake leak warm the bike up and spray some carb leaner at the intake seals if the idle changes the seals are bad. | ||
| Naustin |
Dropped the bike off at the dealer on Tuesday night. They had it all day yesterday, and I didn't hear from them. Hoping to hear something today. | ||
| Johnnylunchbox |
Took her out on Tuesday. She still runs great all the way to redline. What a great bike. Burbling still present, but I am riding around that little problem (I try not to just chop the throttle). However, did notice that she would idle a tad high at times. Wondering if it is the intake leak or loose exhaust that's been mentioned already...Hmmm???? | ||
| Bad_karma |
There is a recall for my 99 S3 for throttle cables. Not sure of the problem haven't taken it in yet. | ||
| Naustin |
I just heard from the shop. The tech said the TPS was off about a degree and that was probably most of it. He also said it had some old buell split-fire plugs in it and he swapped them off for some standard ones. He road it and tells me its all good now... I can't pick it up until after work, but I can't wait to get it back and get some pictures of it...  | ||
| Johnnylunchbox |
Naustin, thanks for the update. Maybe a TPS reset is in the cards for me too. | ||
| Naustin |
I picked the bike up on Friday night after work. The TPS reset and the new plugs definatly made a noticeable improvement. BUT, the problem is not gone. The bike still surges while coasting under 2000 rpm. I'm going to change out the O2 sensor and see if that helps....  | ||
| Johnnylunchbox |
Naustin..keep us in the loop. As I mentioned I am riding around that problem to the point where if I am coasting at 2000 rpm or under, I will just pull in the clutch. Not ideal, I know, but it'll do until the issue is sorted out. I will also try some techron injector cleaner for sh!ts and giggles. | ||
| Naustin |
That's exactly what I'm doing at this point (pulling in the clutch when I get under 2,000 RPM.) I will definatly post any changes in this thread... Nick | ||
| Johnnylunchbox |
Nick, the way I look at it is if your are at 2000 rpms or under you should be dropping down a gear for engine braking, or pulling in the clutch to coast, but I agree that the surging is annoying and should be dealt with. That being said, it's still a great bike though isn't it??? |
