Carb and Spark?

[macguyver]

Hey everybody!
It's been awhile since I've been to the sight. It sure does look great!
Anyhoo....
I was wondering about two things:
1- What does it mean when you unplug 1 spark plug wire and the engine runs BETTER?

2- When I run the Air and Gas mixture screws in or out on my Holley 650 it doesn't seem to make a difference. Any ideas why?

Thanks,
Macguyver

"If it can't get done from the seat of a jeep, it don't need to get done!!"

[ibnfe]

Possibly a crossed wire somewhere? If it's idling rough, you may have two cylinders crossed for some reason, causing 'em to have spark at the bottom of the compression stroke or something. Check the routing, especially if you've done recent ignition/wires work or aren't familiar with the rig and the recent maintenance history.

[64Trvlr]

As for the Holley, do you have it idleing to fast? If so you are past the range of the idle screws so they don't work. Try slowing the idle and then try the mixture screws and see if that helps.
:cool:

[macguyver]

Thanks guys!
Excellant info so far! Keep it coming. I'll will try both of these suggestions right now.
Macguyver