The power supply system (carburetor) of the car Audi 100 C3

Power supply system
The fuel system of a carburetor engine consists of a fuel tank, fuel pump, carburetor, air filter and fuel lines. Carburetors can be installed single- or...

Replacing the air filter element
Air filter 1 - warm air intake shield; 2 - clamp; 3 - warm air supply hose; 4 - spring clip; 5 - vacuum hose of the thermostat valve; 6 - thermostat flap; 7 -...

Removal and installation the air filter
Execution order 1. Remove the filter element (see Fig. Air filter and paragraphs 1–3 of subsection 6.1.1 ). 2. Loosen the clamps. 3. Remove hoses (3) and (8)...

Checking the thermostat
Depending on the ambient temperature or vacuum, the thermostat controls the flow of warm or cold air supplied to the carburetor. Damage to the thermostat will...

Checking the thermostat valve
Thermostat valve (see fig. Air filter ) controls the damper. If the valve is faulty, there may be interruptions in the engine operation at idle in the warm-up...

Removal and installation the fuel pump
Fuel system of the 1.9L engine 1 - fuel pump; 2 - fuel pump mounting bolt; 3 - washer; 4 - gasket; 5 - heat-insulating gasket; 6 - fuel supply hose to the...

Checking the fuel pump discharge pressure
The fuel pressure at the outlet of the fuel pump is not regulated. If the pressure drops below the norm, the fuel pump is replaced. Execution order 1. Connect...

Removal and installation the accelerator drive cable
Execution order 1. Remove the air filter (cm. subsection 6.1.2 ). 2. Disconnect the cable from the carburetor throttle lever. 3. Disconnect the cable from the...

Adjusting the accelerator cable
Execution order 1. Disconnect the cable from the carburetor throttle lever. 2. Set the accelerator pedal so that the distance from the pedal to the stop on the...

Replacing the fuel level sensor
Execution order 1. Disconnect the wire from the negative terminal of the battery. 2. Remove the trunk floor mat. 3. Remove the cover located on the trunk floor...
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Removal and installation the fuel tank
Execution order 1. Disconnect the wire from the negative terminal of the battery. 2. Pump out the remaining fuel from the tank. 3. Disconnect from the sensor...

Replacing the fine fuel filter
The filter must be replaced every 10,000 km. Execution order 1. Disconnect the wire from the negative terminal of the battery. 2. Remove the fastening clamps...

Removal and installation the carburetor
Intake manifold and carburetor of 1.8L engine 1 - intake pipe heater; 2 - sealing ring; 3 - gasket; 4 - inlet pipe; 5 - clamp; 6 - carburetor heating hose; 7 -...

Disassembly and assembly of the carburetor
Carburetor parts 1B3 1 - heating element; 2 - carburetor body; 3 - sealing ring; 4 - mixture quality (composition) adjustment screw; 5 - electromagnetic valve;...

Disassembly and assembly of carburetors of other models
Disassembly and assembly of carburetors of other models is carried out similarly. When assembling a carburetor, the following must be taken into account. For...

Pierburg 1B3 Carburetor Adjustments
The design of the 1B3 carburetor is shown in Fig. Carburetor parts 1B3 . Carburetor vacuum connections 1B3 1 - thermostat; 2 - air filter; 3 - thermostat...

Adjusting the engine starting speed (Pierburg 1B3)
Execution order 1. Start and warm up the engine. 2. Turn off the engine. 3. Connect a control tachometer to the engine. 4. Turn the lever (2) so that the...

Adjusting the starting clearances of the air damper (Pierburg 1B3)
Execution order 1. Remove the starter cover (see Fig. Carburetor parts 1B3 ). 2. Open the throttle valve fully. 3. Connect a vacuum gauge and a vacuum pump to...

Adjusting the throttle opening (Pierburg 1B3)
The throttle position is adjusted at the factory and no adjustment is required during operation. However, if the adjustment has been disturbed, it must be...

Adjusting the accelerator pump (Pierburg 1B3)
Execution order 1. Remove the carburetor. 2. Fill the float chamber with fuel and place a measuring cup with a funnel under the carburetor. 3. Move the lever...

Idle speed adjustment (Pierburg 1B3)
The adjustment is carried out on a warmed-up engine with adjusted clearances in the valve drive mechanism and ignition timing. Execution order 1. Connect a...

Pierburg 2E2 carburetor adjustments
Carburetor parts 2E2 1 - pneumatic drive of the second chamber throttle valve; 2 - accelerator cable bracket; 3 - carburetor body; 4 - heating element; 5 -...

Adjusting the engine start speed (Pierburg 2E2)
Adjusting the engine start speed on a 2E2 carburetor 1 - throttle valve limit screw; 2 - throttle lever; 3 - movable rod of the pneumatic drive; 4 - pneumatic...

Adjusting the starting clearances of the air damper (Pierburg 2E2)
Execution order 1. Remove the starter cover (see Fig. Carburetor parts 2E2 ). 2. Pull the air damper control lever down and secure it in this position. 3....

Checking the pneumatic drive of the second chamber throttle valve (Pierburg 2E2)
Execution order 1. Connect to the pneumatic drive (see Fig. Carburetor parts 2E2 ) vacuum gauge and vacuum pump and create a vacuum of 50 mbar in the pneumatic...

Adjusting the opening of the throttle valve of the second chamber (Pierburg 2E2)
The position of the second chamber throttle valve is adjusted at the factory. If the adjustment is disturbed, it must be restored. Execution order 1. Fully...

Adjusting the accelerator pump (Pierburg 2E2)
Execution order 1. Remove the carburetor. 2. Fully retract the movable rod (see Fig. Adjusting the engine start speed on a 2E2 carburetor ), and then open the...

Checking the operation of the pneumatic drive of the first chamber throttle valve (Pierburg 2E2)
The test is performed at forced idle speed. Execution order 1. Disconnect the vacuum hoses from the pneumatic drive (see Fig. Adjusting the engine start speed...

Idle speed adjustment (Pierburg 2E2)
Carburetor 2E2 mixture quality (composition) adjustment screw 1 - mixture quality (composition) adjustment screw; 2 - adjusting screw for the protrusion of the...

Keihin Carburetor Adjustments
Keihin Carburetor Parts 1 - pneumatic drive of the first chamber throttle valve; 2 - bracket; 3 - pneumatic drive of the second chamber throttle valve; 4 -...

Adjusting the engine starting speed (Keihin)
Adjusting the opening of the throttle valve of the first chamber of the Keihin carburetor Squeezing the lever with pliers. 1 - first chamber throttle actuator...

Adjusting the starting clearance of the air damper (Keihin)
Keihin carburetor choke lever 1 - air damper drive lever; 2 - pneumatic drive rod; 3 - rubber band fixing the lever; 4 - pneumatic drive of the air damper; 5 -...

Adjusting the opening of the throttle valve of the second chamber (Keihin)
Adjusting the opening of the throttle valve of the second chamber of the Keihin carburetor 1 - lock nut; 2 - limiting screw of the second chamber throttle...

Adjusting the performance of the accelerator pump (Keihin)
Keihin carburetor mixture quality (composition) adjustment screw 1 - mixture quality (composition) adjustment screw; 2 - first chamber throttle control lever;...

Idle speed adjustment (Keihin)
The adjustment is carried out with the ignition timing correctly set and the power consumers switched off. Execution order 1. Warm up the engine to operating...

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100(C4, 1990-1994)

100(C4, 1990-1994, petrol)

100(C3, 1982-1990)

100(C3, 1982-1990, petrol)

100(C3, 1982-1990, diesel)