Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Installing Lean & Rich Mixture Stop Screw Plugs
10. With solenoid plunger travel correctly set, install plugs (supplied in service kits) in the air horn, as follows:
a. Install plug, hollow end down, into the access hole to lean mixture solenoid screw and use suitably size punch to drive plug into the air horn
until the top of the plug is even with the lower edge of the hole chamfer. Plug must be installed to retain the screw setting and to prevent fuel
vapor loss.
b. Install plug, with hollow end down, over the rich mixture stop screw access hole, and drive plug into place so that the top of the plug is 1/16"
below the surface of the air horn casting. Plug must be installed to retain screw setting.
