PGM-FI Needed?

briancmartin

briancmartin

Joined
May 3, 2021
Messages
4
Age
62
Location
Maine
I had the code 26 (with no degraded performance), replaced the knock sensor, wiring is good - So, any ideas why the PGM (ECU?) now still throws the code _ AND, after running a short time loses power?

Prior to replacement the bike ran great.
 
I bet your ST is a 2007 or older, right?

Unfortunately, the problem is almost certainly the ECM itself. It is an unrepairable defect that affects pre-2008 models. If you find no other defect, the fix is to replace the expensive ECM.
 
As did my '03, and I bit the bullet and bought a new ECU in April, no problems since.

Josh
 
Flash 2002 said:
I found this, I don't if there good.

https://www.ecurepair.com.au/product/honda-st1300-abs-unit-ecu/
Click to expand...
If you wish to send an ST1300 ECM for repair, find out exactly what they will do to it first.

There is another company called Gen-Tune who claimed that they could repair the ST1300 ECM code 25/26 error. In the end, it seemed like what they were doing is they disabled the ECM's ability to illuminate the FI light when a code 25/26 was triggered. That is not repairing the problem, but rather hiding it. This can be harmful if genuine persistent pre-ignition is happening and not being controlled.

Gen-Tune was asked about this, and they never clarified whether they fix or mask the problem as far as I can recall. If someone knows that they can repair it, this would be a good resource for ST owners. If it is masking that is being done, a piece of tape over the FI light is much more cost effective. Buyer beware.
 
Josh_ST said:
As did my '03, and I bit the bullet and bought a new ECU in April, no problems since.

Josh
Click to expand...


So yes, this an older model, an ‘03.

Josh - where did you get the part?

Perhaps I am not searching for the right part, what is the part number/name I should be looking for?
 
briancmartin said:
Thank you Andrew.

Now, does anyone know where I can find this part? It is out of production.
Click to expand...
Check post #22 in the below thread for possible interchangability.
I take no responsibility for the information- confirm before purchase.

New to ST1300 ownership-- learning quickly about FI light and issues.... HELP! | ST1300 Related

The ECM has a voltage failure on the 25/26 port aka the knock sensors. You can replace it with any of the four ECM models or buy a new one. It's not the harness, save yourself the hassle and don't break it. 4 ECM models? Please explain!
www.st-owners.com www.st-owners.com
 
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