Stalls at idle

[tartan30cirrus]

After being fully warmed up my A4 runs great but struggles at idle. When I bring her down to idle she purs at 800 rpm no prob but begins to settle into 700-750 and then stalls. i feel she should be able to handle this...my previous sick/ailing A4 certainly could. Thus, I do not think I need to adjust the idle rpm screw. What about the fuel/air mixture screw? Would others advise playing with that? I just don't want to mess with the mixture too much; screwed that up in the past and fouled the plugs.

Cheers,
Clint

[tartan30cirrus]

Can someone confirm...idle mixture screw...turn in for increasing ratio turn out to lean ratio...if I am struggling to maintain idle rpm which would make more sense...turn in or out. I will play

Cheers,
Clint

[Don Moyer]

Clint,

You turn the idle mixture screw in (clockwise) to make the mixture richer, and out (counterclockwise) to make it leaner.

When engines stall while idling, it is usually because they are too lean. This means that you may want to turn the mixture adjustment in a half turn or so as your first shot. If the engine idles worse, turn the adjustment back out until it idles reliably.

Don