Jeep 4.0 Fuel Injector Upgrade. Can someone please explain to me what the injector upgrade is all about?? Some online company's do it as well.
In this new series i will show you how to make many repares and upgrades to a 2001 jeep cherokee 4.0 4x4 with automatic transmission.
4 hole fuel injector upgrade? I heard that they are using ford mustang injectors as an upgrade for the 2001 jeep cherokee 4.0 6cyl. Ev1 plug for direct fit in early 4.0. Your engine will feel just like new again!injectors are remanufactured/rebuilt and may have some wear/tear on the bodies of the injectors as they are not new.