Yes—the 1988 Jeep Cherokee XJ was fuel-injected. In that model year, the lineup carried electronic fuel injection on both available engines, with the 4.0-liter inline-six using multi-point fuel injection and the 2.5-liter four-cylinder also equipped with EFI in most U.S.-market examples. Some very early or non-U.S. variants could differ, but EFI was standard in America for 1988 Cherokees.
Engine options and fuel systems
The 1988 Cherokee was offered with two engine choices, and both used electronic fuel delivery in typical North American configurations. Below are the key points for each engine.
2.5L inline-four (I4)
The 2.5L four-cylinder in the 1988 Cherokee was equipped with electronic fuel injection in most U.S. models, replacing the older carbureted setup. The exact EFI arrangement could vary by production date or market, but EFI was standard for this engine in the 1988 Cherokee lineup. To confirm, inspect the intake area for fuel injectors or a small fuel rail along the top of the engine.
4.0L inline-six (I6)
The 4.0L inline-six in the 1988 Cherokee used multi-point fuel injection (MPI) across typical U.S.-market models. This system injects fuel at multiple ports along the intake manifold, rather than at a single throttle body. It’s a hallmark of the late-1980s AMC-era 4.0L engine family.
How to verify if a specific 1988 Cherokee is fuel-injected
Look for signs of an EFI system rather than a carburetor. The following indicators help distinguish EFI from carburetion on a 1988 Cherokee.
- Inspect the intake manifold area for individual injectors feeding each cylinder (MPI) or for a plenum with a single or paired injectors in the throttle body (TBI or early EFI variants).
- Check for a fuel rail with electrical connectors and wiring running to injectors along the intake manifold.
- Notice the absence of a carburetor atop the engine; EFI-equipped engines use fuel injectors and require less air from a traditional carburetor setup.
- Look for an onboard diagnostic port (OBD I-era in 1988 models) or factory service manuals that specify EFI equipment.
If your vehicle has no carburetor and shows a fuel rail with injectors or multiple injector ports, it is fuel-injected. If you still see a carburetor with a mechanical linkage, it would not be EFI.