Quadra Jet stuck open at idle

[chev-obsession]

Hey guys,

So my truck has sat for a couple of years. I went to start it up and gas started pouring out of the Holley carb. So I put the original Quadra jet back on to see if I could get it to fire and move it around. After putting what I thought was fresh gas into the tank and a new fuel filter, the truck fired up, idled and ran great. Almost to the point to where it was too good to be true! Turned it off and left it for a couple days.

Then I go out this morning, put some good tires on it to get it moveable, the truck started but “idle’d” at 2,500-3,000 rpm’s, almost like something in the carb is stuck open. Noticed the gas had turned green in the clear fuel filter. Would the gas have caused something to get plugged up with in the last 2 days of sitting or is it a simple fix like a lever is stuck open or closed?

I looked around, rev’d the engine up to see if the choke was stuck open and it did not idle down. And the idle screw is backed down quite a ways to where I know that is not the issue.

Any ideas what it could be? I’m at a loss