Picking the best jeep 4.0 injectors for your rig

If you're noticing a rough idle or your fuel economy has tanked lately, it might be time to look at your jeep 4.0 injectors. That inline-six engine is legendary for its longevity—often referred to as a "tractor engine" because it just won't quit—but the fuel system components definitely have a shelf life. Most of these Jeeps are rocking decades-old technology, and the stock injectors are a prime example of where a little modern tech can go a long way. ...

May 4, 2026 · 7 min · Connie Garbiella