| Author | Message | ||
     Shanetbolt |
I have owned my 99 S3 since new and one of the first things I had a dealer put on was the Buell race ECM. Only because that was a last resort to fixing a surging problem. Now years later and the bike is at 29750 miles, a couple days ago my bike started stumbling or cut out at steady speeds or accelerating. This happens when the bike is at operating temp and gets worse if you continue to ride. Now you know the problem. My bike is at a dealer and they are telling me the race ECM is the problem seeing how I have no other performance mods. The race ECM makes the bike run rich and it took 28,000 miles for the problem to show up. I find that hard to believe, they have not found a solution yet, what do you all think? | ||
| Josh_ |
If they didn't "reset" the TPS when they installed the ECM, it could have been running rich all this time. They claim the problem is carbon build-up? | ||
| Shanetbolt |
Thanks Josh, I did not want to make my question into a book, but yes when I had the race ECM installed they said they reset the TPS and now this dealer is telling me that the TPS was not reset. Is that possible to tell if was done or not? Who do I believe, dealer 1, dealer 2, or those who eat and sleep Buell's? | ||
| Blackbelt |
EAT AND SLEEP HEHEHEHHE My bike does that every now and then and i have a stock ECM, figure that one out.... it helped when i swapped to a new O2 sensor, but my exhaust went kaput, and i had to put eh stock muffler back on and i think that messed up the O2 sensor again.. try swapping to the Bosch sensor... i can't remember the model number but it isn't hard to find... like model 12042 or something like that | ||
| Josh_ |
Hmmm, I don't know for sure if the TPS can get "off" so it would be hard to know if it was originally done correctly or not. What are they saying? They rest it and it runs fine? (<30min operation if they work slow). No worries about writing a "book" - Blake doesn't charge per word  | ||
| Josh_ |
> a couple days ago my bike started stumbling or cut out at steady speeds >>My bike does that every now and then and Now that blackbelt brings it up, I have the race ECM and mine occasionally does it as well, say every 1000miles or so, when I slightly accelerate from steady cruise it will hic-up. Bosch 02 sensor is #12014 | ||
| Nevco1 |
Shane...Take it to All Pro on 164 in Waukesha. Ask for Mark Hanrahan (sp?). He is the Harley Guru that set up my bike. Tell him I sent you. He can run it on the dyno. Chances are you are running lean at certain rpm's. He has Techlusion Digital Fuel Optimizers in stock, as well as a lot of other stuff for our bikes, and can set you up in no time. Only thing he didn't do for me was reset the TPS. Sent me to HOH for that. Then back to the dyno for final dial in. You may want to have the TPS reset before you go to All Pro Nice thing about the DFO is you can note the settings and zero it out for the TPS reset. Then just set it back to the dyno settings. No computer downloads to mess with. | ||
| Dynarider |
Could also just be that the ecm has taken a crap. On my Dyna everything was fine & then I started having symptoms similar to yours. Was fine when the bike was cold, but as it warmed up it got worse. I checked a few things out & came up empty, then decided just for the hell of it to swap out the screaming eagle ignition....similar to the ecm..with a spare unit I just so happened to have. Problem was solved. | ||
| Blackbelt |
i was close on the O2 sensor... hehehehe just a couple numbers that is a cheap try to start with, and if it doesnt' work go for the ECM, but i like to go the cheap route first | ||
| Bomber |
coils are also heat sensitive . .. . . .I've had them crap out after causing similar problems in a number of vehicles | ||
| Hootowl |
Shane, Your stock 99 ECM has an update available for it that reduces the tendency to stumble at low speeds. It was a mapping problem. (I have a 99 too) I also had a "cut out" problem I would experience at speed occasionally. It was as if I'd turned the ignition off for a split second. If this is what you are experiencing, it may be your kick stand cutout switch. Bypass the switch, and see if your problem goes away. | ||
| Shanetbolt |
Well I just got a call and it seems the connection at the fuel injectors were pulling apart or something along those lines and they will have new pins tomorrow. Hopefully that solves it because I will go thru withdrawls if I have to bikeless over the weekend. Thank you all for your valuable input. I'll let you know the actual fix when this is all over with. | ||
| Nevco1 |
Shane...Don't hold back...I need to hear the resolution of this issue. | ||
| Shanetbolt |
Ok all, the bike is fixed. The end fix was the wires that plug  into the rear fuel injector. They were near wore thru and cut. Only a couple wire strands were left to make the connection. Hopefully my bike was a one in a million case and not something those with fuel injection will have to go thru. Thanks again to all, now lets go riding. |
