If your fuel efficiency is on the decline, this can indicate a number of issues, and a bad VW Solex carburetor is one of them. When it comes to the type of carburetor that you need, you need to look at the type of engine in your vehicle because you have to choose between a one-barrel carburetor, four-barrel carburetor, and two-barrel carburetor. You must also explore the options that match the year and model of your vehicle so that you can be sure it fits and works as intended. This vehicle part is necessary for many reasons, including regulating the fuel to air ratio, turning air and gas into a combustible mixture, and controlling the speed of the engine. If a carburetor is going bad, it can alter any of these processes and cause a wide variety of problems. In addition to issues with fuel efficiency, things like abnormal idle speed, stalling, flooding, and hesitation are all possible. Examine the large inventory of VW Solex carburetors on eBay to find the one that matches your vehicle.