Firebird V8-305 5.0L (1982)
Mixture Control Solenoid: Technical Service Bulletins
Fuel System - Revised Mixture Control Adjustments
Number 82-I-230
Section 6 Date 02/83
Subject:
REVISED MIXTURE CONTROL ADJUSTMENTS AND SPECIFICATIONS FOR 1978-1982 COMPUTER COMMAND CONTR
Some important changes have been made in the procedures for adjusting the Lean and Rich Mixture Screws and the Idle Air Bleed Valve on Computer
Command Controlled Quadrajet and Dualjet carburetors. The new procedure involves making the settings to a dimension, rather than to a certain number
of screw turns. It is still possible to adjust a carburetor following an overhaul or if a System Performance check indicates this is required.
The new procedure applies to all "Closed Loop" Dualjet and Quadrajets (E2MC, E2ME, E4MC and E4ME) carburetors and should be used in place of
all other procedures. Revised specifications for these adjustments are included in this bulletin and should also be used in place of all other published
specifications.
MIXTURE CONTROL SOLENOID PLUNGER ADJUSTMENTS
FIGURE 1 - INSTALLING MIXTURE CONTROL (SOLENOID) GAGING TOOL
Installing Mixture Control Solenoid Gaging Tool
1.
Remove air horn, mixture control solenoid plunger, air horn gasket and plastic filler block, using normal service procedures.
2.
Remove metering rod on throttle bellcrank side of carburetor and install the mixture control solenoid gaging tool (J-33815-1, BT-8253-A) or
equivalent, over the metering jet rod guide and reinstall the solenoid plunger (see Figure 1).
FIGURE 2 - ADJUSTING LEAN MIXTURE (SOLENOID) SCREW
Adjusting Lean & Rich Mixture Solenoid Screws
1.
Hold the solenoid plunger down, against the solenoid stop or gaging tool, and use tool (J-28696-10, BT-7928) or equivalent, to turn lean mixture
screw until the plunger just breaks contact with the gaging tool. Then, turn lean mixture screw slowly until the plunger just contacts the gaging
tool. The adjustment is correct when the solenoid plunger contacts both the solenoid stop and the gaging tool (see Figure 2 on the following page)..
2.
Remove gaging tool and reinstall metering rod, plastic filler block and air horn gasket.
3.
Remove lean and rich mixture adjustment screw plugs and back out the rich mixture stop screw. Reassemble the carburetor.
