1st Jeep-need advice on engine options for my 86 258 with 999 trans - JeepForum.com
LinkBack Thread Tools
post #1 of 4 Old 11-16-2012, 12:00 PM Thread Starter
Registered User
1986 CJ7 
Join Date: Nov 2012
Location: nashville
Posts: 115
1st Jeep-need advice on engine options for my 86 258 with 999 trans

Hey guys,

Im new to the tread and I just bought my first jeep 86' cj7 258 with auto transmittion dana 44 rear. Ive currently got it at the mechanic now looking it over to find any issues/ check for incorrect components from po/etc. It drives great other than I think the collant system needs work as some of the rubber lines are swollen. The the po installed a 4 barrel carb and trans cooler along with replacing some bad rotted lines. My first problem is that I live in Nashville , TN and have to take it through emissions to be street legal. When I took it through it failed misserably on the sniffer. Heres a few options im considering:

1.Find a way to get away without having to go through emmisions ( probubly unlikely option)

2. Keep stock motor and Trans and get tuned up that it will pass emmisions - if thats even possible

3 .Install a Howell Fuel injection system for better reliability/performance/emmisions

4. Buy a crate 350 ( yes a crate because id rather install new and not have to trust that someone else's motor is in good shape) If i go this route can i keep my stock trans ( i believe the 999?) or will i need to swap also?

my plan is to mainly use on street but also be able to use as a weekend warrior.


Attached Thumbnails
rear.JPG   interior dash.JPG   jeep.jpg  
aufan is offline  
Sponsored Links
post #2 of 4 Old 11-16-2012, 12:05 PM
Registered User
1984 CJ7 
Join Date: Mar 2009
Location: nj
Posts: 2,390
You could go with Fuel injection if you have the funds. Do you have all the pollution stuff still on the engine? If so I would dump 4 Barral Weber and install a Carter BBD with Stepper, or a MC2100.
waterdowg is offline  
post #3 of 4 Old 11-16-2012, 12:37 PM
Registered User
1981 CJ8 
Join Date: Apr 2010
Location: The Little Apple
Posts: 3,408
What's your budget and what's involved in the emissions testing?

If you're emissions test requires a visual inspection, a new carb like the MC2100 may not work - depends if the testing center pays that close attention. If there's no visual, I agree with an MC2100 provided all of the pollution equipment (EGR, TVS, smog pump) is still there. If you go fuel injection, technically you're still supposed to have an EGR with TVS, but you can ditch the smog pump. You'll need a catalytic converter either way.

Let us know - I went with fuel injection because I had no smog equipment two years ago and passed. This past year they decided they were going to do visual inspections and I had to go back through and add an OEM intake and exhaust manifold, working EGR, etc. etc.

You may also consider a 4.0 head swap with MPFI, depending on how strict things are. The emissions place in CO said it was a gray area and was up to the inspectors if they would pass it or not. My guess is that half of them don't have a clue what they're doing anyway.
walkerhoundvm is offline  
post #4 of 4 Old 11-16-2012, 01:08 PM
Registered User
1984 CJ7 
Join Date: Mar 2009
Location: nj
Posts: 2,390
My 84 is stock but does not have a smog pump, but has everthing else. Was the smog pump a Cali thing?
waterdowg is offline  

Quick Reply

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


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

Email Address:


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

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