Home » Jeep Engine & Fuel System » Fuel Injection » Fuel Injection Conversion Kits » Howell Engine Developments Fuel Injection Conversion

Howell Engine Developments YJ258 Fuel Injection Conversion for 87-91 Jeep Wrangler YJ with 6 Cylinder

Quadratec Part #: 17002.20D
Howell Engine Developments Part #: YJ258
Let's face it, those 2 barrel carburetors have been a disaster to keep running correctly. Computer controlled Fuel injection is less sensitive to shock and vibration from extreme 4 wheeling. Systems include all necessary components: 2 barrel TBI unit w/ interal throttle position sensor, idle air controller, and on board computer (no programming required). All components are reliable off the shelf parts found on many American vehicles. If you want better driveability, improved fuel mileage and less maintenance, this is the way to go.

CARB Notice

  • Legal in California, or other states adopting California emissions standards, only for racing vehicles that may never be used, registered or licensed for use, upon a highway. Can not be shipped to California residents.
Installation Notes
Installation Difficulty:
Level 4Experts Only

Welding required for 02 sensor bung.

Installation Time: 2-4 hours
Parts Included

Throttle Body
Inline fuel pump
Fuel line
Wiring Harness
Gaskets and washers
O2 sensor bung (weld in)
02 sensor
Temperature sensor
Adapter plate
Full Instructions

90 Day Limited Warranty, Computer Warrantied for 6 months.
  • Engine Size: 4.2L 258ci I-6
  • Engine Fuel: Gasoline
  • Shipping Weight: 15lb
  • Jeep Wrangler (YJ)

  • 1991 Jeep Wrangler (YJ)
  • 1990 Jeep Wrangler (YJ)
  • 1989 Jeep Wrangler (YJ)
  • 1988 Jeep Wrangler (YJ)
  • 1987 Jeep Wrangler (YJ)
Share Your Thoughts
Review Summary
Based on 1 reviews
Shared Media

Customer Submitted Photos

Howell Engine Developments Fuel Injection Conversion Reviews