The Haynes CJ manual is the best one for the engine and under hood
wiring for the 258 YJ's.
The ignition module is 'Waaaaaayyyyy' down under the washer bottle at
the bottom of the fender skirt.
Here is a good site for all things 258:
http://home.sprynet.com/~dale02/list.htm
Here are some specifics about killing that Ford emissions cpmputer:
http://home.sprynet.com/~dale02/ignmods.htm
And:
http://www.off-road.com/jeep/jnutter1.htm
I prefer to add two new wires when bypassing the computer by hooking the
orange and purple wires at the ignition module directly to the orange
and purple wires at the distributor rather than mess inside the
harness. Especially in a YJ, because the colors in the harness are
different than the CJ the article is written about.
Here is an article on the HEI:
http://www.geocities.com/jeeperaz/hei.htm
Here is a 'great' article on getting that Weber-Carter BBD purring at
idle:
http://jeep.off-road.com/jeep/articl....jsp?id=277064
Hope some of this helps,
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06
http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
"LoneGreyWolf via CarKB.com" wrote:
>
> Do any of you have the diagrams for the HEI upgrade? My Chilton book puts
> the ignition control module where there is nothing. Picture the book gives
> doesn't look like anything under the hood of my 88 YJ. The "directions" the
> supplier sent are a watered down version of someone else's vague write up.
> The CJ5 and 7's the conversions were done on had way different wiring and
> connections. Any current, detailed write ups for an 88YJ withe the 258 6I
> would be very helpful.
>
> Earle Horton wrote:
> >For a longer lasting solution, rubber corks from a chemical supply house.
> >;^)
> >
> >It's funny; I used to work on automobiles full time in the seventies, right
> >when the pollution controls all came out. After working on a few vehicles I
> >figured, along with a lot of other mechanics, that the damn things didn't do
> >anything except make the cars run more poorly and use more fuel. Except the
> >PCV, of course, don't disconnect that. A big laugh was the attempt to use
> >higher (numerically lower) gear ratios in an attempt to increase fuel
> >mileage (kilometerage north of the border). The Dodge dealer where I worked
> >did a healthy business in axle ratio changes, in order to restore a
> >semblance of performance and economy to his customer's vehicles.
> >
> >Now with fuel injection this is all theoretically "better", but as Mike
> >likes to say a properly tuned carburetor performs quite nicely too.
> >
> >Earle
> >
> >> Someone else just had the same problem in a 258 YJ and after figuring
> >> his PCV system was likely working ok, the diagnosis appeared to be a bad
> >[quoted text clipped - 42 lines]
> >> > Message posted via CarKB.com
> >> > http://www.carkb.com/Uwe/Forums.aspx/jeep-cars/200612/1
>
> --
> Message posted via CarKB.com
> http://www.carkb.com/Uwe/Forums.aspx/jeep-cars/200612/1