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fuel trim rate of change

Posted: Mon Nov 17, 2014 8:15 pm
by touge tom
Hi guys. Im experiencing some wild a/f ratio swing from rich to lean. I was told in a previous post I put up. I should check the rate of change. Could someone please explain what this section does and ckuld it fix the wild a/f ratio swing I have when @ cruising speeds?

Re: fuel trim rate of change

Posted: Tue Nov 18, 2014 10:17 am
by Spunkster
Have you read the info in the help file at: http://www.hondata.com/help/smanager/cl ... losed+loop

Re: fuel trim rate of change

Posted: Wed Nov 19, 2014 12:22 am
by touge tom
I've read it but I doesn't explain what actuall changes. Is it the a/f swing when in between changing gears?

Re: fuel trim rate of change

Posted: Wed Nov 19, 2014 1:16 am
by touge tom
Say if I reduced the rate of change %'s would rapid changes in throttle position equate to a smoother/less a/f ratio swing.

Re: fuel trim rate of change

Posted: Wed Nov 19, 2014 11:56 am
by Spunkster
This has nothing to do with throttle position. It has to do with the short term fuel trim values.

Re: fuel trim rate of change

Posted: Wed Nov 19, 2014 5:52 pm
by touge tom
i'll re word what i meant.

Say if I reduced the rate of change %'s would rapid changes in engine load /vacuum equate to a smoother/less a/f ratio swing.

Re: fuel trim rate of change

Posted: Thu Nov 20, 2014 10:18 am
by Spunkster
It is something you will have to try, what works well for one setup may not work well with another.

Re: fuel trim rate of change

Posted: Thu Nov 20, 2014 4:56 pm
by touge tom
Thanks mate. I'll keep on it and keep at! If I get time off from work.