Fuel Injection Conversion - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-20-2009, 11:12 PM   #1
Aka Vaultzz

WF Supporting Member
Vaultzz's Avatar
Join Date: Jul 2009
Location: My Secret Lab
Posts: 5,624
Vaultzz is on a distinguished road
Fuel Injection Conversion


So I'm sure that many of you have seen the $1,200 kit from quadratec. (Howell Engine Developments CA-YJ258 1 - Howell Fuel Injection Conversion (California Legal) for 87-91 Jeep® Wrangler YJ with 258c.i. 6 Cylinder - Quadratec)

I was recently told to just search around junkyards till I get all the parts necessary from newer engines and doing the conversion that way.

So my questions are, Will this work? and Will I need 2 computers? (I'm not sure if my engine even has one, I've never looked for it)

The YJ is in Rebuild Mode
Vaultzz is offline   Quote
Old 12-21-2009, 07:32 AM   #2
that's what she said

WF Supporting Member
jgano23's Avatar
Join Date: Oct 2008
Location: \m/-_-\m/
Posts: 16,482
jgano23 is on a distinguished road
Send a message via AIM to jgano23 Send a message via Yahoo to jgano23
i have that kit in my cj and it is awesome, but i just happened to have the kit laying around in my garage. if you don't just have the part laying around and you don't want to spend $1300 for the kit, you can do a 4.2 to 4.0 head swap. i got the howell kit for my hubby a few years ago for his yj, but he never installed it, so he decided to put it in my cj. once he gets the yj back together he is going to do a head swap. i found a pretty good write up on the swap 4.2 to 4.0 Swap

jgano23 is offline   Quote
Old 12-21-2009, 12:57 PM   #3
birdhunter's Avatar
Join Date: Jan 2009
Location: Wisconsin
Posts: 1,495
birdhunter is on a distinguished road
Ya bud if you do
that you might as well stroke it
Look up docs build I think he
did that added injection(head) from a 4.0 and stroked
the motor

"locked and loaded"
birdhunter is offline   Quote
Old 12-21-2009, 01:34 PM   #4
yj-genral's Avatar
Join Date: Oct 2009
Location: cleveland, TN
Posts: 1,075
yj-genral is on a distinguished road
yeh im spending about the same cash on a v8 TPI fuel injection swap
yj-genral is offline   Quote
Old 12-21-2009, 06:19 PM   #5
cheapjeep71's Avatar
Join Date: Oct 2009
Location: Waverly
Posts: 207
cheapjeep71 is on a distinguished road
GM 1/2 ton & s-10 trucks in the late 80s to the early 90s used the same Howell setup. I'm not enirely sure all that you need to cabbage off the donor vehicle, but it can be done. And yes, you do have a computer in your Jeep. If it's an 87 thru 90 258 it has a computer feedback carb on it. These are complete trash!!!! You also have one that controls the distributor also.
1990 YJ 4" BDS lift, shackle reversal, 33" TSLs
cheapjeep71 is offline   Quote
Old 09-08-2010, 06:04 PM   #6
Join Date: Nov 2006
Location: New Jersey
Posts: 14
WranglerX3 is on a distinguished road
Hey Everybody,
I'm trying to get a little help with my Howell Fuel Injection Conversion.
I'm nearing the end of a 2 year rebuild of my 89 YJ 4.2L, 5 speed, I removed everything and started from the ground up. I have installed a rebuilt 4.2 and I am wondering what stuff I need to PUT BACK on it. I have most of the installation done, the vacuum lines, the TBI, sensors, fuel pump / filter, the problem is the main wiring harness. I read somewhere that MOST of the wires can be removed. If anyone has any information on what wires / plugs can be pulled out, that would be great.

WranglerX3 is offline   Quote

conversion , fuel injection

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need help with Fuel Injection Install astout13 YJ Tech Forum 1 10-18-2009 01:28 AM
Fuel injection tonkchief YJ Tech Forum 6 02-07-2009 06:06 PM
custom fuel injection Iquois YJ General Discussion Forum 1 04-02-2007 11:19 AM
fuel injection conversion canadianyjkid YJ General Discussion Forum 0 03-27-2007 09:10 PM
AMC 401 fuel injection jeepers creepers CJ Tech Forum 4 08-13-2006 01:40 PM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 05:52 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC
« Back

Enter your email address:

Delivered by FeedBurner