Howell Engine Developments YJ258 1987-90 WRANGL Fuel Injection Conversion for 87-91 Jeep Wrangler YJ with 6 Cylinder
Welding required for 02 sensor bung.
Throttle Body
Inline fuel pump
Fuel line
Wiring Harness
ECM
Gaskets and washers
O2 sensor bung (weld in)
02 sensor
Temperature sensor
Adapter plate
Hardware
Full Instructions
- Engine Size: 4.2L 258ci I-6
- 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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Howell Engine Developments Fuel Injection Conversion Reviews
Took me 5 days to pull the old wiring and rewire everything. I was being careful to get it right and get rid of any wiring I didn't need. Lot's of instructions but did it one step at a time. I think it's the best mod I've done to the Jeep. I have a 1988 YJ with the 258. I had already added a Davis HEI but this throttle body injection is much, much better than the old carb. I've been running it for 2 years with no problems and great reliability.