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Howell Engine Developments CA-YJ258 Fuel Injection Conversion (California Legal) for 87-91 Jeep Wrangler YJ with 258c.i. 6 Cylinder

Quadratec Part #: 17002.21D
Howell Engine Developments Part #: CA-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

  • 50 State Legal - CARB E.O. Number D-452

For California residents and other states with strict emissions regulations including:
New York
Emission legal under CA EO #D452, for street use.

Installation Notes
Installation Difficulty:
Level 4Experts Only

Emission Legal under CA EO #D452, for street use.

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)
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