Need some guidance - JeepForum.com

 
LinkBack Thread Tools
post #1 of 5 Old 08-17-2011, 07:42 PM Thread Starter
jth0033
Registered User
1987 YJ Wrangler 
 
Join Date: Jul 2009
Location: Downingtown
Posts: 871
Need some guidance

Alrighty fellow Jeepers, I need some advice or guidance. Within the past year my grandmother has passed and left the family with some money. My dad decided to give my sister and I each $1000 and then put the rest into savings. I've been struggling with the carburetor as of late and wonder if FI is my answer. Alright, here is the decision to be made. Do I use the money to install a FI onto my 4.2 or do I look around and swap in a 4.0L? Any other ideas are surely welcome. Thanks and hope you all can help me sway my decision.

jth0033 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 08-18-2011, 07:00 AM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 21,932
Your 4.2L Is pretty much a 4.0L already. You can just get the intake and underhood electrical from a 91-95 4.0L and swap it over to get FI. It would be much cheaper too.
Que89YJ is offline  
post #3 of 5 Old 08-18-2011, 07:07 AM Thread Starter
jth0033
Registered User
1987 YJ Wrangler 
 
Join Date: Jul 2009
Location: Downingtown
Posts: 871
I like where your going with this? Is there special casting numbers for the intakes and such? I will have to do some research when I get a chance.
jth0033 is offline  
post #4 of 5 Old 08-18-2011, 07:25 AM
raynmaker
Registered User
1990 YJ Wrangler 
 
Join Date: Feb 2010
Location: colorado springs
Posts: 700
There is a very good thread on that swap. Some mods are needed for the power steering box and to the intake itself but looks easy enought.

Another option is a TBI from a gm. No mods (just adapter plate) but lots of wires which I think you have to do with the 4.0 intake also. (I went this way. Less labor but more thinking.)

You can also do the entire 4.0 head swap.

Warning: This poster has infinite knowledge of useless information and redneck tendencies. Use info at your own discretion. :wave:
raynmaker is offline  
post #5 of 5 Old 08-18-2011, 07:56 AM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 21,932
There is no special numbers for castings. The intake from a 91-95 4.0L wrangler or Cherokee and all the wiring from under the hood because they are very similar. No Grands because the ECU and wiring are different. Everything is pretty much bolt on. The ECU needs a crank position sensor input and a Vehicle Speed sensor input. So you need a Flywheel from a FI or the Hesco cranks setup and a VSS that combines the mechanical cable with a electronic output like the 91YJ. Last is the fuel. The MPFI have a closed loop system with high pressure pump in the tank. You can get a used tank and pump setup for around $100(It gives you an extra 5 gallons) and replumb the gas or get an external one that is self regulating.


http://www.jeepforum.com/forum/f8/ju...riteup-294427/

You can do it on the cheap and I think for under $500 be MPFI.

The head swap is something different and not needed for the MPFI. It suppose to give you an extra 40HP.
Que89YJ is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Need a little guidance here... HurricaneRZA YJ Wrangler Technical Forum 19 06-08-2011 07:19 AM
need some help and guidance TJmooker TJ Wrangler Technical Forum 13 04-23-2008 08:25 PM
Need some help/guidance. MPowerM3 TJ Wrangler Technical Forum 3 11-07-2006 02:41 PM
Need guidance Tray TJ Wrangler Technical Forum 9 08-14-2006 06:34 PM
Looking for a little guidance ryko212 YJ Wrangler Technical Forum 13 04-19-2006 04:13 PM

Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome