Jpdiag

Hi, i have to set the CO on my SF 848 after synching the throttle bodies.
I'm not very sure on how to use the CO Trim page, I've searched on google but I've only found not very good explanations or some with a different interface from my version of JPDiag. I suppose the "Wished CO value" is where you input the value you want to set, which you then apply by pressing the "Confirm button" but what's the "test" button for?
Also what the slider just below do?
I suppose "Actual CO" is where the actual value of the trimmer is shown, and the "Initial CO" just keeps there the trimmer value before any edit, correct?

yes you got it right
the test button allows to test the trimmer value without storing it
you have 5 seconds to press the store button if you are happy with the result.
the reason of this is to recover a good setting if the test is not good and could make your engine stall

you are close the good value when the iddle is maxixum ,then you can add +2 to not be too lean

the graph on the rigth have iddle on the ordonate ( Y) and trimmer value on the abciss (X)
then you have a record of higher RPM vs trimmer value

the slider or +/- buttons does the same thing

Thank you
When you talk about keeping the trim value when the idle is highest and add +2 to not be too lean, are you talking about if someone tries to set the CO without a tester?
I will use a gas tester so I'll set it around 4-5%, do you still suggest to set it +2 ?

no 4-5% is rich enough no need to make it richer

how did you do on the carburator machines , you turn the air screw untill the rpm is at the highest value, then you close it by half turn.
i think it's quite similar with the injectuion trimmer , you adjsut the trimmer until the rpm is at the max , then you make it a little bit richer to preserve the engine .
this st when when you have no tooling to measure what you are doing