Air fuel ratio Ljet Options

[Geezer914]

I am trying to adjust the air fuel ratio on me 2056 Ljet. I read the article that was posted a while back. I adjusted the wiper arm and set the idle at 1100 rpm (Raby 9550 cam) with the idle AFR at 13.2. When I check the high rpm the AFR is at 12.1. If I adjust the high rpm AFR to 13.2, (moving the large wheel 7 teeth CW) the the idle AFR is 16.9 with the mix screw all the way down. If I readjust the wiper arm to 13.2, then the high rpm AFR goes back to 12.2. Can't seem to find a happy medium. I know when you adjust the wiper arm it changes the mixture linear from idle to high rpm. How much more can I adjust the large wheel CW?

[wonkipop]

i'm probably not much help - i have an entirely stock set up thats reasonably low miles and hasn't given me too much trouble - apart from cold start issues to do with AAV same as @Van B .

all i can offer is that at idle and at WOT the throttle valve switch lets the ECU know what the mixture should be (and at idle the screw adjustment on the AFM). in between its down to the AFM flapper and the signal it sends to the ECU.

that is assuming everything else is set up right. valve adjustment, timing etc.
and there is no reason to doubt you don't have all that set up right.

so i would probably try and get it right for mixture at mid range - and i guess the only way to do that is fiddle with the flapper and AFM.
someone like @Van B or @clayperrine would know exactly how to counsel advice on that. i've never had either the nerve or the need to go into the AFM. but it is all discussed in that article Van B linked to.

if the idle gives you a problem after that you take care of it with the screw adjustment on the flapper and the idle screw on the t/b. entirely separate matter.
thats how i have always understood the L jet.

good luck and hopefully the other guys chime in to assist.