Off-Road Forums & Discussion Groups

Off-Road Forums & Discussion Groups (
-   Jeep-Short Wheelbase (
-   -   TR upgrade question (

popazeus 04-17-2002 09:00 AM

TR upgrade question
My cat didn't run away or any thing but i do have a question. In the post "Which TFI coil and how many volts for TR upgrade?" there where a few diffrent wireing diagrams which on is right for a 85 4.2? I'm gathering parts / info and would like to try to get it done this weekend (wife permitting). How long does it take? And do I need to mess with the timeing?


sevensandeights 04-17-2002 09:08 AM

Re: TR upgrade question
The second drawing is the most accurate one in the post. The first is just plain wrong and the last one is for a ford. However, the first one is tailored to the 1978-79 model years. I am sure it is very similar but you should match the color of your wires to the diagram to make sure

The upgrade is easy to do. If you buy pre-made wires, the whole thing should take less than two hours. 75% of your time will be making a bracket for the new coil. It may be worth your time to go to a yard and buy one.

popazeus 04-17-2002 10:49 AM

Re: TR upgrade question
what do you mean pre-made wires? and what is E.E.C?


Junk Yard Genius 04-17-2002 01:53 PM

Re: TR upgrade question
Pre-made spark plug wires, like for a '95 Jeep with a 4.0 liter engine is what you are going to need...

E.E.C. is Ford's way of saying the distributor no longer has vacuum advance, the computer is taking the timing chores over.
E.E.C. is Electronic Engine Control.
You don't need a diagram for an '85, you aren't changing any wiring.

You need the following...
From '82 Ford F-150 pickup with 300 CID I-6
Distributor Cap Adaptor
Distributor Cap &amp; Rotor with BRASS TERMINALS

One set of premium spark plug wires from a '95 Jeep with 4.0 Liter engine.

If you decide to change the coil to the E-core...
The ignition coil from a '92 Ford Escort with I-4 Engine
A Coil connector from NAPA, P/N ICC-1
Crimp on spade terminals, and push them into the old coil connector.
(this way, if the new coil fails, you can use either type coil to get home)

Watch for Red wire to Red wire, Green wire to Green wire.

This is simply a tune up, no new wiring is involved.

popazeus 04-17-2002 04:48 PM

Re: TR upgrade question
thanks ... any recomendations on how / where to put the new coil?

Junk Yard Genius 04-17-2002 09:35 PM

Re: TR upgrade question
You REALLY don't want me to tell you where to put it! [img]images/icons/wink.gif[/img]

Anywhere is fine...
Most people choose the intake close to the distributor, or the top of the inner fender.
Either is find as long as you use a top quality (I suggest MSD 8.8) coil wire.

popazeus 04-18-2002 08:06 AM

Re: TR upgrade question
ha ha [img]images/icons/smile.gif[/img] I should have see that comming. I just asked because on the earlier post said 75% of the time was making the mount / mounting the coil


sevensandeights 04-18-2002 12:14 PM

Re: TR upgrade question
I did the upgrade to an AMC V8 and modified the factory bracket. I think the easiest and safest place for a 258 I6 would be on the fender. However, if you do this you will probably need a longer coil wire.

All times are GMT -5. The time now is 10:51 PM.

Powered by vBulletin® Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright 1994-2009, VerticalScope Inc. // Off Road forums & discussion groups sitemap
side by side | atv | dirtbike | snowmobile | sandsport | competition | land use | Jeep | Toyota | Ford | GM

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