Discussion in 'GMC Truck Forum' started by TomPiantanida, Feb 7, 2009.
How do I remove the idle mixture plugs from the Quadrajet on my 1983 GMC C3500 with 454?
You're talking about the little brass caps that are keeping you from accessing the heads of the screws? If so, you will destroy the little caps to get them out. A tiny drill bit to make a hole and a dental pick to get them out.
I use a drywall screw. I screw it in just to the first thred, just enough to hold the plug, and I pull on the screw. These things pop out easilly.
I have also run the screw in far enough that the screw makes contact against the adjustment screw and after a slight turn (by hand) the plugs also pop right out.
They are pretty easy to get out.
take the carb off, flip it over, look for 2 dots by each cap, with a hacksaw blade cut a groove about 3/8' toward the center of the carb from both dots, chip the piece out and tap the cap out.
That's how we used to do it!
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