Carburetor - ROCHESTER E2SE 2-Bbl: Description

The Rochester Varajet Carburetor E2SE is a 2-stage, 2-barrel downdraft carburetors. The primary stage consists of a triple venturi with a 35 mm bore. The secondary stage has a 46 mm bore and is equipped with an air valve with a single tapered metering rod. Both are equipped with integral, electronically-activated chokes, a choke vacuum break diaphragm and an idle speed solenoid.

All E2SE models are equipped with an electrically operated mixture control solenoid. The mixture control solenoid is mounted on the air horn and extends into fuel bowl. Fuel metering is controlled by the mixture control solenoid plunger opening and closing the fuel passage to the main metering jet.

All models are equipped with a Throttle Position Sensor (TPS) to electrically signal the ECM of throttle position. An Idle Speed Device, either an Idle Stop Solenoid (ISS) or a Throttle Lever Actuator (TLA) is used to position the primary throttle valve to provide engine idle speed requirements.

NOTE: No attempt should be made to set curb idle speed with the Idle Stop Solenoid.

Carburetors are equipped with a temperature regulated pump system with a thermostatically controlled by-pass valve. The by-pass valve is permanently pressed into the air horn. All carburetors are equipped with tamper-resistant features: Factory-adjusted rich mixture screws, factory-adjusted lean mixture screws, riveted choke coil housing and hardened steel pump lever. All models are also equipped with idle mixture screw plugs.

CAUTION: NO ATTEMPT should be made to adjust screws except when required by a Computer Command Control System performance check, a major overhaul, or replacement of the air horn, float bowl or throttle body.