screw on air flow meter

[JP360]

hi all,
ive got a E16SE engine and on the air flow meter theres a plastic screw. im just wondering what this is and what changes if i turn it?

cheers JP360

[bazil]

Idle mixture

[JP360]

cheers buddy. still having a few teething issues from when i first put the engine in a month ago and was wondering if that screw would sort it lol

[Curtoise]

is it just idle mixture? im sure its the CO screw to richen/lean the mixture in general ?

[Lewis.]

this /\ effective at all revs. don't bugger about with it though, it is very slow to react, and needs setting up on a gas analyser. not a driveway job

what issues are you having?

[Curtoise]

yeah you want to take it to a garage, the CO should be between 1-2 and the hydro carbons HCO at 400-600

[bazil]

I'm not certain, but pretty sure it only sets the idle co as a base then the ecu takes over from there when the TPS opens, iirc its stamped idle CO next the the screw.