Hey all, I think I've finally had enough of the 3-4000rpm stumble/pop/misfire that seems to plague these early FI bikes. I've done the Brad Black throttle body setup and TPS setup and that's helped but I've just been in contact with Brad and he recommends trying a Euro chip vs the US chip I currently have. Would anyone have a stock ST2 eprom stuffed away in their garage? If I get this and it still doesn't work my next task is learning how to program and burn eproms with a wideband O2 sensor! cheers
I haven't got one spare but I'm happy to lend you mine. It is totally standard (I hope!). If it is relatively easy to extract, then you are welcome to it.
Ah, didn't notice the (very obvious) flag!..I'm in no rush to get it back and so the offer is still there. Isn't getting one from a breaker/scrapyard a possibility?
There are a few options on eBay.co.uk at present https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=Ducati+ST2+Eprom&_sacat=0 What year is yours? I have a 1998 ST2, I've only had it since Jan this year but the fuelling on it is so smooth, much more so than my later bikes, particularly from low revs. I guess in a round about way I'm asking are you 100% certain it's the EPROM?
Glad you asked. All those chips are for modded bikes, open pipes, airbox mods, etc. Mine is stock and I'd like to keep it that way as I don't really want to tick off the neighbors coming home late at night. Throttle bodies, TPS, and CO have been set up a la Brad Black which has helped quite a bit. Fuel pressure has been checked at 46psi, fuel filter has been replaced, plugs have been replaced. Next step is pulling the injectors and getting them cleaned and spray pattern checked. But I am really not looking forward to having to mess with that damn airbox again! From what I understand 3-4000 rpm is right where the bikes are tested for emissions and are notoriously lean in that area. One test I just saw said that on the dyno in that area they were seeing an a:f ratio of 15:1! My bike is fine at idle, off idle, and above 4k. In the lower gears I can roll on at say 2k and it will pull through 3-4k no issues. Only steady throttle between 3-4k is there an issue.
I could but if I got one from here that wouldn't change anything. Brad was suggesting that the Euro chip might have different fueling than the NA chips. But one website I found seemed to suggest their chip would fit both market models so now I'm confused,............again.
Check the part numbers. A Euro chip would physically fit but may be a different fuel map - due to differing fuel and emission standards.
Absolutely. That's why I'm here. This is the place I was talking about that had the chip. He states " used on the following models " not " will fit the following models" . Semantics I know. https://www.motorcyclespareparts.eu/en/ducati-parts/54610791a
I think you may find US and UK bikes are the same in terms of build with mph speedos etc. My 2002 ST4 has cats in the exhaust which I don't think were a euro requirement at the time so I assume Ducati built all bikes to the highest spec. That would suggest the EPROMS would also be the same as my bike is happiest above 4.000 rpm in higher gears as you say yours is. Maybe the earlier EPROMS were different, you may have entered a minefield, good luck
Ouch, that’s expensive, no wonder you want to try one first. I’m not sure but can you ‘flash’ an EPROM chip ? @chrisw If so a visit to a dyno specialist might be able to cure it for you.
Eeproms can be copied and flashed but it is not something I have done. Someone posted on Multistrada.ms that they had done the US/EU switch and found no benefit.
So after much digging, I happened to stumble onto someone in the US who has done a custom tune on a stock ST2! He's willing to sell me a chip and I'll give it a try. Was a little surprised to see his dyno charts for the stock ecu and to see a:f ratios varying from 14:1 to nearly 16:1 !! No wonder it wasn't happy! Now I realize that this will be a compromise as it wasn't tuned for my bike but it should be a lot closer than what I have now.
Interesting topic .... Yes , you certainly can ..... in the trade they use the term " blowing " an EEPROM I've done it thousands of times ..... both as a tech at Philips electronics and later for a firm that restored / converted classic pinball machines . The necessary equipment ranges from about £60 up to £1000 or more . I've often thought about providing a service , and trying to build up a library of maps ..... but I wonder if there are legal / copyright issues with advertising and running it as a business
rhubarbray, I too am in the US and just acquired a '99 ST2 that is unpleasant to ride just as you describe. Would you be willing to share the info of the gentleman with the chip, in the hopes he'd sell me one too? It's pretty much to where it would be the decision point of keeping or selling the bike. Thanks.
Hi. I don't think he'll have any issues selling you a chip but tell you what. Let me try the chip and see if it works the way I hope it will then I'll report back here. I'll ask him if he's ok with me giving out his name and business here. I don't think he's sent it yet so it's going to be a bit of a wait.
That would be great, thank you. I'm also relieved that the flat spot isn't my imagination or poor maintenance skills.
The wait is going to be a bit longer, issue with the chip. He's going to burn me another and send it.
Ok! Good news, finally have the chip in the bike after much back and forth with the developer. Much, much better! I'd say the 3-4k stumble is 90 percent gone. There's still a slight stumble between 3800-4000 but perhaps only because I was looking for it. Around 34-3600 all seems good and she seems to have more grunt from 5-7k. It does seem to use more fuel but I've only done a short bit and it's chucking it down outside so no testing today. The developer has also sent me his latest tune for the bike as the first one to make sure the files weren't corrupt. The second chip goes in today and I'll report later. The tuners' name is Doug Lofgren and his email address is [email protected] If you have a stock ST2 I highly recommend this tune!
