If your Jeep is the CJ-7 or an early Wrangler YJ with a 4.2 liter engine, you may be familiar with the idling issues of the BBD carburetor. This is especially true as your vehicle ages. When there are problems with any aspect of the ECM or emissions system, Jeep performance can drag considerably. Sure, you can do repairs, but the best thing to do is to replace the stock carburetor altogether with one from the line of performance carburetors carried here on 4WD. Holley Performance, Weber Carbs, Edelbrock and Jet Performance Products are just some of the well known off-road brand performance carburetors carried by 4WD.