Basic data of the carburetor (BMW 3 Series E30)

Carburetor type - 2B4

Release period: September 1982 – August 1983.

Index - 1284605.9



Idle speed - 850±50 rpm

CO content - max 1.0%

Carburetor type - 2BE

Production period: from August 1983.

Index - 12873425.9

Adjustments

Test size of float, mm 28±1 30±1

Air damper regulator

Winding resistance - 0.9-1.7 Ohm

Insulation resistance is infinity



Throttle control valve

Resistance of windings of solenoid valves - 35-80 0m

Recessed pusher size - 55.8-59.1 mm

The size of the released pusher is 69.5-71.5 mm

Pusher stroke - 12.4-13.7 mm

Potentiometer resistance between terminals 4 and 5, plunger recessed or extended - 1400-2600 Ohm

Potentiometer resistance between terminals 7 and 4 (forced stroke position, pusher fully extended) in start position - 0-500 Ohm 900-1900 Ohm

Potentiometer

Total resistance - 1.4-2.6 kOhm

Engine resistance - 0-500 Ohm

Current through the motor - max 1 mA

Working voltage - max 5V

Valve metering additional air in forced idle mode

• The channel is completely closed to the control vacuum value - about 160 mbar
• The channel is fully open to the control vacuum value of about 270 mbar

Intake manifold temperature sensor

Resistance at test temperature

• -10°C — 8.2-10.5 kOhm
• +20°C — 2.2-2.7 kOhm
• +80°C — 300-360 Ohm

Idle speed - 800±50 rpm

With the cable harness connector connected - 900±50 rpm

CO content - max 1.0%

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