2.8L V6

From JeepForum.com Community Jeep Wiki

Under powered for the duty

Indeed, if you're looking for power under the hood of a Jeep, look elsewhere. However, with proper tuning and maintenance, the 2.8L V6 can be a servicable powerplant.

The 2.8L is a sixty degree V6 manufactured for Chevrolet as an economy motor. It was installed in Jeep vehicles with a two-barrel Rochester carburetor. (One barrel is a primary while other is a vacuum-actuated secondary.)

Many 2.8L owners have reported improved performance after installing a high-performance air filter, such as those made by K&N. High performance parts, such as camshafts and aluminum, four-barrel intakes are also available. However, owners shouldn't expect significant power gains from such hardware.

The 2.8L V6 can often have trouble passing emissions tests, especially at high altitudes. The state of Colorado emissions control web site recommended installing a PCV valve for the Chevrolet 305 V8 and adjusting the metering rod in the carburetor primary to keep it from lifting prematurely.