4.0 Jeep Fuel Injectors 1985-1998

Upgrade your Jeep 4.0L engine with this set of Bosch fuel injectors with EV1 connectors, designed for 1985–1998 Jeep Wrangler and Cherokee models. This set provides improved fuel atomization, smoother throttle response, and a noticeable increase in efficiency — even on a stock engine.

These injectors feature a 4‑hole spray pattern, delivering better combustion compared to the original single‑hole design. Each set is professionally rebuilt in‑house to OEM standards and thoroughly tested before shipping.

Rebuild & Testing Process

Every injector undergoes:

• Resistance testing

• Three‑stage ultrasonic cleaning

• Reverse / back‑flush cleaning

• Spray‑pattern verification

• Leak‑down testing at 80 psi

• Installation of all new components:

  • Pintle caps

  • Retainers

  • O‑rings

  • Seals

  • Spacers

  • Filters

Sold as a matched set of 6.