ECU flashing.??

leonides

leonides

Joined
Dec 18, 2018
Messages
237
Age
81
Location
Miami, Fl.
I saw on Youtube.com that the ECU can be flash in order to change the programming of it and improve the performance of the bike.
Any one of the members had tried to do something similar in order to correct the FI false code 26? Or it only works on improving the performance of the bike.
Any comments will be appreciated.
P.B.
 
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Honda ST1300 ECU Flashing

Woolich Racing Honda ST1300 ECU Flashing products allow you to tune the maps and settings in the Honda ST1300 ECU. Fuel Maps, Ignition Maps, Secondary Throttle Plate Maps, RPM Limiters and many more advanced settings can be modified allowing you to tune your bike to the limit.
www.woolichracing.co.uk

I know bugger all about it, but these seem to.
Upt'North.
 
Upt' North said:

Honda ST1300 ECU Flashing

Woolich Racing Honda ST1300 ECU Flashing products allow you to tune the maps and settings in the Honda ST1300 ECU. Fuel Maps, Ignition Maps, Secondary Throttle Plate Maps, RPM Limiters and many more advanced settings can be modified allowing you to tune your bike to the limit.
www.woolichracing.co.uk

I know bugger all about it, but these seem to.
Upt'North.
Click to expand...

Hmmm, might be worth looking into. Too bad they only list 2008 and up.

leonides said:
There are some videos on Youtube.com and there some high-performance bike shops who do it also.
Click to expand...

I've had ECUs flashed before, I just haven't heard of anybody cracking the code on an ST.
 
caldercay said:
Important question: are you primarily interested in fixing the 26 code? Is it on constantly or intermittent?
Click to expand...
After clearing the codes several times, and getting the code 26 again, even when I switched the sensors I had to buy ( with a big pain in my wallet) a new ECU, and the problem is solved.
P.B.
 
Whooshka said:
Hmmm, might be worth looking into. Too bad they only list 2008 and up.
Click to expand...

First I've heard of the ability to flash the ST1300's ECU. The '08 and newer ones have a different ECU with different connectors and everything so retrofitting isn't practical. Maybe the newer ECUs aren't locked down as tightly as we thought the older ones were?
 
leonides said:
There are some videos on Youtube.com and there some high-performance bike shops who do it also.
Click to expand...

Who? Got a link? Or are you just talking in general and not specifically to the ST?

wjbertrand said:
First I've heard of the ability to flash the ST1300's ECU. The '08 and newer ones have a different ECU with different connectors and everything so retrofitting isn't practical. Maybe the newer ECUs aren't locked down as tightly as we thought the older ones were?
Click to expand...

If there actually is a company that has successfully reflashed the ST's ECU there would be a real loud buzz about it here and a very busy and wealthy vendor. ;)
 
I would doubt (but I could be wrong) that our mighty ST1300 uses anything that is drastically different from other Honda bikes of the same time frame. I'd start by finding out who "tunes" the older VFR bikes.
 
So, I've spent a few minutes looking into this. Guhl Motorsports does a bunch of tuning and flashing on sportbikes. A quick search revealed these posts on a VFR board:

"Please keep in mind that we are currently only able to reflash the 2006-2009 VFR800 ECUs. The older ECUs is a whole other project and I'm not even sure they can be reflashed.
I'm still looking for someone local to Ephrata, PA 17522 with an 2006-09 VFR800 to put on the dyno.
Looking at the fuel maps, I see an area in the 2500 RPM range where they are taking away a bunch of fuel and I believe that is a possible cause for the low throttle/low rpm smoothness issue. Since it is in the low load mapping, which is controlled by manifold vacuum and engine speed, it is nearly, if not, impossible to fix with a power commander that uses throttle position and engine speed to control the fuel change. It's like trying to hit a moving target. It is something that is fairly easy to fix in the ECU.
Thanks,
Don Guhl"

On the older ECUs from Don Guhl:
"ecuunleashed or pisani engineering must cut open the ECU to reflash it. We do not. We have reverse engineered the factory flashing protocol for the newer Honda ECUs to flash through the harness connector. To my knowledge, the ECUs previous to 2006 for the VFR800 do not use this protocol. "


The entire thread is here:

Ecu Reflash For The 06-09 Vfr800

As many of you may have seen, we have been able to successfully reflash the 2010-13 VFR1200 (F & DCT models) with fantastic results. We have acquired an 2006-09 VFR800 ECU and have begun the process of disassembling the code. What We would like to know is: Who might be interested in having th...
www.vfrdiscussion.com www.vfrdiscussion.com

After all of that, I'm guessing that the 2003-2007 ECM is probably the "older" style and the 2008+ would be the newer style? Purely speculative on my part. But, if that's true, there's a possibility that the 2008+ could be flashed.
 
wjbertrand said:
First I've heard of the ability to flash the ST1300's ECU. The '08 and newer ones have a different ECU with different connectors and everything so retrofitting isn't practical. Maybe the newer ECUs aren't locked down as tightly as we thought the older ones were?
Click to expand...

Looking at that website again it doesn't look like they actually flash the ECU but rather it looks like they sell you the connection to the ECU and you're on your own. I could be wrong, wouldn't be the first time.

Question... why does everybody keep comparing the ST ECU to the VFR? Do they use the same ECU part number or is because it's a V4 also? There are a lot of variables involved.
 
wjbertrand said:
First I've heard of the ability to flash the ST1300's ECU. The '08 and newer ones have a different ECU with different connectors and everything so retrofitting isn't practical. Maybe the newer ECUs aren't locked down as tightly as we thought the older ones were?
Click to expand...
Well crap...I have an "o4" with 75K miles that just started the dreaded F1 code 26...and the question I was diggin for is will "all" years interchange on the ECU... I have found one from an "11" model and did notice the last 3 digits of the honda part number were different...but wasn't sure if they interchange...from this comment the answer is sadly no....
 
ErnieB said:
Well crap...I have an "o4" with 75K miles that just started the dreaded F1 code 26...
Click to expand...
Save yourself a headache, and swap the ECU out rather than trying to patch the one you have. Yes, it'll hurt your wallet. A member here (I forget who, but there was a thread about it) reports success swapping the standard ECU for a police ECU. It'll probably have a slightly different fuel map, but I doubt anyone would notice unless you put it on a dyno (and even then, you'd probably have to look real close). You'd have to also be careful with the year of ECU.
 
ad.hom said:
Save yourself a headache, and swap the ECU out rather than trying to patch the one you have. Yes, it'll hurt your wallet. A member here (I forget who, but there was a thread about it) reports success swapping the standard ECU for a police ECU. It'll probably have a slightly different fuel map, but I doubt anyone would notice unless you put it on a dyno (and even then, you'd probably have to look real close). You'd have to also be careful with the year of ECU.
Click to expand...

Before springing for a replacement ECM, verify that your sensors and their leads are actually OK. There have been a number of cases where the knock sensor code was due to a melted/damaged harness (they pass close to the exhausts) and resolved by repairing that. Could save some serious $$$.
 
ad.hom said:
Save yourself a headache, and swap the ECU out rather than trying to patch the one you have. Yes, it'll hurt your wallet. A member here (I forget who, but there was a thread about it) reports success swapping the standard ECU for a police ECU. It'll probably have a slightly different fuel map, but I doubt anyone would notice unless you put it on a dyno (and even then, you'd probably have to look real close). You'd have to also be careful with the year of ECU.
Click to expand...
What he said.

I tried 2Ebay units (one fixed the problem for half a day). I put in a new wiring harness. I bought a new knock sensor...

Finally, I bought a new ECM, and it takes 10 minutes to replace. Hurt the wallet but was an easy fix.
 
wjbertrand said:
Before springing for a replacement ECM, verify that your sensors and their leads are actually OK. There have been a number of cases where the knock sensor code was due to a melted/damaged harness (they pass close to the exhausts) and resolved by repairing that. Could save some serious $$$.
Click to expand...
Just curious I'm new to the forum but, I bought a 2003 Honda ST about 2 wks ago and my wife and I were going on a ride and about 40 miles into it I got the FI light code 26 . I purchased from a fellow that has had it for a couple months. The bike has 35700 miles on it. Bike is clean and seems garage kept. This fellow had put new tires on it . He owns BMWs and said they are his thing. Anyway he and I have been trying to figure out the issue and have taken the nox sensor out and swapped sides and it still giving the code after we unhooked battery overnight and touched leads together. Clearing said code. We checked wiring from sensor wire to ECM and have continuity. The code is right side nox sensor even after swapping sides it's still coding on right side. We've checked fuel pressure sensor . Next we are going to change fuel filter and gasket and try that. Then probably clean the fuel injectors. He thinks that If we buy a ECM and it's another problem we stand a chance ruining the new ECM. I'm in NC and got a quote on partzilla and it's $1054.73 to order it. Does anyone have a better priced source??? Thanks Joe
 
Hi it's your resident ECU healer. So here's the deal with the FI-26 error. The [mainly 2005] had a manufacturing defect causing a voltage failure across the knock sensor portion of the board. Can it be "healed"? No. It is not possible to open the unit. "Flashing"? That's funny. The only option is to replace. Don't worry VZST, you're not going to blow out the replacement.
The eBay units are hit and miss.
 
Keep an eye out for good used ones. I have a 2004 (120,000 miles) that also had the FI-26 error. Bought one from someone parting out a 2003 model for less than $300 and it solved the problem. I think if my only option was to buy new, I would live with the problem.
 
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