UK Monster Owners Club Forum » .: Technical :. » Electrics » Adjusting ECU trim

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Old 20-06-2022, 04:48 PM   #1
Bitza
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Adjusting ECU trim

Hi all, I've got JPDiag on my laptop that I've never really used apart from resetting the TPS, but I would now like to use it to adjust the fuel trim. I'm guessing that the smaller the number the leaner it will run, and have no idea what a significant adjustment would be, like the equivalent to 2 clicks on suspension. Can anyone give me a few pointers?
Background:- I have the choice of two different fuel feed configurations that I can fit to my heap the original return system where the smaller throttle opening tend to be fine but a bit lean at larger opening, and I also have a direct feed system that basically seems to give a slightly higher working pressure, so not so great at small openings (a bit rich) with the odd pop of excess fuel burning in the exhaust on the over-run, but better at larger openings. Obviously I run the direct system so would like to trim the fuel back a bit (leaner), long term I'm planning on a remap of the ECU.
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Old 20-06-2022, 05:04 PM   #2
Kato
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https://www.youtube.com/watch?v=c0ndcGKHWf8&t=214s
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Old 08-07-2022, 06:39 PM   #3
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Well first off the YouTube vid is not a great help, but thanks for the suggestion.
But have worked it out, air/water temp has to be 40degrees +, the engine has to be running, select the co2 level (ducati settings 22-28 as standard), press the test button and then the confirm to save new setting.
Due to my non-Ducati fuel pump/direct fuel line set-up, I've gone fron 22 to 20. Results after quick test run are looking good right through the range, doesn't often turn out like that.
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