<P> Carburetors were the usual method of fuel delivery for most US - made gasoline - fueled engines up until the late 1980s, when fuel injection became the preferred method . This change was dictated more by the requirements of catalytic converters than by any inherent inefficiency of carburation; a catalytic converter requires much more precise control over the fuel / air mixture, to closely control the amount of oxygen in the exhaust gases . In the U.S. market, the last carbureted cars were: </P> <Ul> <Li> 1990 (General public): Oldsmobile Custom Cruiser, Buick Estate Wagon, Cadillac Brougham, Honda Prelude (Base Model), Subaru Justy </Li> <Li> 1991 (Police): Ford Crown Victoria Police Interceptor with the 5.8 L (351 cu in) V8 engine . </Li> <Li> 1991 (SUV): Jeep Grand Wagoneer with the AMC 360 cu in (5.9 L) V8 engine . </Li> <Li> 1993 Mazda B2200 (Light Truck) </Li> <Li> 1994 (Light truck): Isuzu </Li> </Ul> <Li> 1990 (General public): Oldsmobile Custom Cruiser, Buick Estate Wagon, Cadillac Brougham, Honda Prelude (Base Model), Subaru Justy </Li> <Li> 1991 (Police): Ford Crown Victoria Police Interceptor with the 5.8 L (351 cu in) V8 engine . </Li>

What is an accelerator pump on a carburetor