GM Computer-Controlled Carburetor Tools These tools are designed to adjust settings on computer-controlled Rochester, DualJet, QuadraJet, and VaraJet carburetors on carburated GM engines. Applications:
• 2 mm double-D – VaraJet lean authority screw and idle air bleed; and DualJet and QuadraJet mixture control adjusting screw.
• 2.5 mm hex – DualJet and QuadraJet TPS adjusting screw.
• 7 mm double-D – DualJet and QuadraJet main metering jets.
• 10 mm double-D – DualJet and QuadraJet mixture control solenoid-rich screw. No. 7667 – GM computer-controlled carburetor tools.
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