[gtofreek]

Joe, does the engine try to slow down when you run the A/F screws all the way in? The engine should try to die, or die. If it doesn't, it sounds to me like it is getting idle fuel from the transition slot from the butterflies being open too far at idle to get enough air to idle. You may need to put a small hole in the front butterflies in order to get the butterflies closed enough to not pull fuel from the transition slot.. Cliff or someone else more proficient with Q-jets can correct me if I'm wrong, but that's what it sounds like to me.

[JMB36TA]

Hey Paul. I don't notice a difference in the RPMs when I turn the screws all the way in or if I back them way out. There may be a slight difference but I don't have a tach to be certain. I tried to adjust it with the engine at operating temp so the butterflies were open. One thing I read was to cover the front opening with your hand to see if the engine races, mine dies.

[Greg Reid]

Originally Posted by JMB36TA

One thing I read was to cover the front opening with your hand to see if the engine races, mine dies.

You may know this but just to be clear, you only partially cover the primary side of the air-horn with your hand. Don't choke it out completely. You're just interrupting the air flow a bit to see if it's rich or lean in the idle circuit.

[JMB36TA]

Originally Posted by gtofreek

Joe, does the engine try to slow down when you run the A/F screws all the way in? The engine should try to die, or die. If it doesn't, it sounds to me like it is getting idle fuel from the transition slot from the butterflies being open too far at idle to get enough air to idle. You may need to put a small hole in the front butterflies in order to get the butterflies closed enough to not pull fuel from the transition slot.. Cliff or someone else more proficient with Q-jets can correct me if I'm wrong, but that's what it sounds like to me.

I got a little confused on your post, you were referring to the throttle blades not the idle blades. I can't see down in there to see if they're open all the way or not, but there are already holes in the blades. I don't see transition holes though. Wouldn't they be above and below the plate in line with the idle screw holes?