B11 Sunny MPG versions used an Hitachi DFP306 carburetor. It is a feedback carburetor which uses an O2 sensor and air/fuel solenoid so it can dynamically adjust the air-fuel mixture. The 306 is a smaller version of the DFP342 used on the Z24-powered Datsun 720 pickup.
Overview
FOR COMPARISON: DFP-342/DFP-384 parts diagram
1982-1983 Nissan Sentra "MPG" Mazda GLC 1.5 * Fuel-cut solenoid (same spot as B110 DCH306) * Fuel Bowl Solenoid * Air fuel solenoid * vacuum secondary like the B310 DCR306
DCP
DCP306-23 1984-1987 Subaru
DFE
B11.USA.E16S.FED.AT.0882-0983 16010-34WOO DFE2832-2 B11.USA.E16S.FED.AT.0983-0284 16010-34W10 DFE2832-2A B11.USA.E16S.FED.AT.0983-0284 16010-34W11 DFE2832-2B B11.USA.E16S.FED.AT.0983-0284 16010-34W12 DFE2832-5 B11.USA.E16S.FED.AT.0284-0584 16010-34W13 <> 16010-34W12 DFE2832-6 B11.USA.E16S.FED.AT.0584-0185 16010-34W14 DFE2832-12 B11.USA.E16S.FED.AT.0185-0385 16010-34W21 DFE2832-14 B11.USA.E16S.FED.AT.0385- 16010-34W22/16010-34W23