I .  Rochester - TYPICAL MODELS-4MV-M4ME

1.a. General Description

1.b.  Two basic carburetor model designs 

II.                            Rochester -CARBURETOR IDENTIFICATION

2.a. Service Features

III.                         Rochester - OPERATING SYSTEMS FLOAT SYSTEMS

     3.a. Float system operates in the following manner

IV.                          Rochester -IDLE SYSTEM

4.a.  Idle system operates

V.  Rochester - OFF-IDLE OPERATION

                        5.a. Adjustable Air Bleed

                        5.b. Fixed Idle Air By-Pass

                        5.c.  Purge Porting

                        5.d. Purge system operates as follows

                                    5.d.1 Constant Canister Purge

                                    5.d.2. Timed Canister Purge

                                    5.d.3. Exhaust Gas Recirculation

                                    5.d.4. Transmission Converter Clutch

                                    5.d.5.  Hot Idle Compensator

VI.                          Rochester -MAIN METERING SYSTEM -4MV-4MC MODELS

6.a. Main metering system operates as follows

VII. Rochester - ADJUSTABLE PART THROTTLE FEATURE 4MV-4MC MODELS

            7.a. Adjustable Main Well Bleed

            7.b. Pull-Over Enrichment (P.O.E.)

            7.c.  Main Well Air Bleed Tubes

VIII. Rochester -MAIN METERING SYSTEM M4MC-M4ME MODELS

            8.a. Adjustable Part Throttle

            8.b. Altitude Compensation

            8.c.  Separated Main Wells

IX.   Rochester - ADJUSTABLE PART THROTTLE FEATURE

            9.a. Power System

            9.b. Power System – Mechanical Operation

X.   Rochester - MULTIPLE STAGE POWER ENRICHMENT

            10.a. Auxiliary Power Piston

            10.b. Main (Primary) Power Piston

            10.c. Power System – Turbocharger Applications

            10.d. Power system operates as follows:

                        10.d.1 Secondary System

XI. Rochester - AIR VALVE DASHPOT

            11.a. Two different types of air valve dashpots used in the Quadrajet carburetor:

                        11.a.1 Accelerating Pump System

                        11.a.2. Choke System

                                    11.a.2.1. Choke system operates

XII.  Rochester - SECONDARY THROTTLE VALVE LOCKOUT

            12.a. Air Valve Lockout

            12.b. Choke System With Spring Assist Choke Closing System

XIII. Rochester -CHOKE SYSTEM WITH VACUUM BREAK CLOSING ASSIST SPRING

            13.a. Choke System With Delayed Vacuum Break Feature

                        13.a.1. Delay feature operates

            13.b. Choke System With Vacuum Bucking Spring

XIV. Rochester -CHOKE SYSTEM WITH DUAL DELAYED VACUUM BREAK SYSTEM

            14.a. Dual delayed vacuum break system operates

            14.b. Choke System – 4MC (Early)

XV.                        Rochester - CHOKE SYSTEM – 4MC (LATE)

15.a. Choke System – M4MC-M4MCA

15.b. Fast Idle Cam Pull-Off Feature

15.c. Choke System – M4ME M4MEA With Electric Choke

XVI. Rochester - COMBINATION EMISSION CONTROL (C.E.C.) VALVE

            16.a. Idle Stop Solenoid 

            16.b. Throttle Lever Actuator

                        16.b.1. TRC system operates

            16.c. Idle Load Compensator (ILC)