Author Topic: Modified Vacuum line diagram for the 258  (Read 49869 times)

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Offline Bird-o-Prey

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Modified Vacuum line diagram for the 258
« on: October 02, 2006, 10:54:04 PM »
OK, we have all asked about it but finally, here it is for everyone to see.  I spent more than a couple of days working this one out.  All of the emissions equipment is gone :o.  All that remains are the essential systems.

Brake Booster
EGR valve
Sole-vac
Distributor advance
4x4 vacuum
PCV & Fuel cannister
Choke (on mine)

Also, I have the TVS & TAC Vac. motor in the air cleaner cove connected.  I hope this helps every one out there who may be in the same boat I was.  Also, I hope it helps those of you doing EXTENDED bench testing of their pollution / emissions equipment.  I have set my car up like this and I also test ran it and boy is it ever smooooooth now!  This worked for me, but I don't suggest you should go out blindly and start ripping out components.  Remember the old axiom..."If it ain't broke, DON'T fix it"!!! ;)



No matter how bad YOU think it is ... it could always be WORSE!!

Offline mccastlej

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Re: Modified Vacuum line diagram for the 258
« Reply #1 on: October 02, 2006, 11:29:18 PM »
Thanks a bunch!  I am going to try to tackle this myself tomorrow, and now you've made it a whole lot easier for me to do!  I'm not sure if I'm going to hook up the tac vac motor though. 

Offline Bird-o-Prey

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Re: Modified Vacuum line diagram for the 258
« Reply #2 on: October 02, 2006, 11:43:21 PM »
It was there and it does perform a useful service if you live in a part of the worl where it can get cold out.  Especially in winter.
No matter how bad YOU think it is ... it could always be WORSE!!

Offline mccastlej

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Re: Modified Vacuum line diagram for the 258
« Reply #3 on: October 02, 2006, 11:47:21 PM »
You have a good point there as I do live in Michigan.  I have two different things in the same area as the tac vac motor.  I'll guess I'll have to look a bit better, and see what the deal is?

Offline Bird-o-Prey

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Re: Modified Vacuum line diagram for the 258
« Reply #4 on: October 02, 2006, 11:50:05 PM »
Most of the vacuum diagrams in the TSM show 2(?) TAC Vac motors.  My air cleaner cover only had one, so that's how my diagram came out.  I expect it wouldn't be too hard to plumb in the other one shown in the TSM.  Just splice in the line where it looks appropriate and works best.
No matter how bad YOU think it is ... it could always be WORSE!!

Offline IowaEagle

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Re: Modified Vacuum line diagram for the 258
« Reply #5 on: October 03, 2006, 07:48:47 AM »
One of mine is wired open.  Think it is the front one that restricts air intake when warming up?  Thanks a bunch for this Bird-O-Prey.  Now to remember to get it in the Eaglepedia too.
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Offline trapperjack

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Re: Modified Vacuum line diagram for the 258
« Reply #6 on: October 03, 2006, 05:57:27 PM »
Great job. Wish this had been there when I started my "bench testing". I'm goigng to see how what I ended up with compares to this. Did you do ECM Test yet?
trapperjack
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Offline Bird-o-Prey

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Re: Modified Vacuum line diagram for the 258
« Reply #7 on: October 03, 2006, 06:19:10 PM »
I still have some electrical issues to look into.  There is a little doo-hickey next to the TVS which is supposed to connect to the computer (and in my car, does not).  Also, I have some other wires that dont seem to be connected to anything.  However, the car does seem to run better, and I will be giving it a full tune up before I run it through the emissions test.
No matter how bad YOU think it is ... it could always be WORSE!!

Offline IowaEagle

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Re: Modified Vacuum line diagram for the 258
« Reply #8 on: October 03, 2006, 06:38:24 PM »
Let us know what you get for readiings.  That should be interesting.
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Not a Jeep.  Not a Car.  Its an AMC Eagle!

1982 Eagle SX/4 Sport;
1980 Concord DL;
1970 Ambassador 2 Dr HT, SST
1995 Jeep Cherokee Sport;
2002 Hyundai Santa Fe;
2008 Jeep Patriot Sport - Freedom Drive II

hojorisin

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Re: Modified Vacuum line diagram for the 258
« Reply #9 on: October 03, 2006, 11:50:03 PM »
Of the Eagles I have that have two vac motors on snorkel :   the one closer to inside/air cleaner is to shut off air intake completely (it overrides the front / pre heat one) w/car off; this is to prevent run-on/dieseling; I also have wired one of these full open (bad motor) ; you should still use the heat one tho--great in winter

Offline Bird-o-Prey

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Re: Modified Vacuum line diagram for the 258
« Reply #10 on: October 04, 2006, 02:25:50 PM »
After much Futzing about with the lines untill 1 am, I managed to get the 4wd shift motors re-connected properly.  However, the road test was less than spectacular.  When I shift in & out of 4wd, I once again get the little wheeze from the switch that lets me know things are working.  I shifted in to 4x4 mode and the ride that had previously been choppy, had smoothed out (ditto for the ride in 2wd).  However...  During my test run, as I was slowing down to make a turn, I heard the most peculiar buzzing/grinding sound, and the beasty was back to shuddering and bouncing along again.  I still get the wheeze from behind the switch, but the car won't stay fully engaged in either driving mode!  The lesson here...if it ain't broke, don't fix it!!!  I just had to clean off the grease/oil/dirt/accumulated crud to make it all look better, didn't I?  I suspect that my cleaning has revealed a hitherto sealed leak in one (or both) of the vacuum shift motors.  Now where did I put that diagram for modifying my shift motors to be cable actuated...hmmm??
No matter how bad YOU think it is ... it could always be WORSE!!

Offline ozzman104

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Re: Modified Vacuum line diagram for the 258
« Reply #11 on: October 08, 2006, 05:41:38 PM »
Well, I just got done redoing my vacuum lines using this diagram.  The mess of unnecessary lines I took out was amazing.  oh yeah...  and the wagon runs great now.... especially for a $300 that they were going to scrap because of a leaking fuel tank.

Offline IowaEagle

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Re: Modified Vacuum line diagram for the 258
« Reply #12 on: October 08, 2006, 06:11:27 PM »
GREAT!  Another satisfied AMC Eagle Nest Member.  Now I need to do the same.
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Not a Jeep.  Not a Car.  Its an AMC Eagle!

1982 Eagle SX/4 Sport;
1980 Concord DL;
1970 Ambassador 2 Dr HT, SST
1995 Jeep Cherokee Sport;
2002 Hyundai Santa Fe;
2008 Jeep Patriot Sport - Freedom Drive II

Offline trapperjack

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Re: Modified Vacuum line diagram for the 258
« Reply #13 on: October 16, 2006, 09:03:15 PM »
Any updates, Bird-O-Prey? how's she running?
Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contsesting the vote.

"Political correctness is a doctrine fostered by a delusional, illogical liberal minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

"When governments fear the people there is liberty. When the people fear the government there is tyranny."
                  Thomas Jefferson
"The very atmosphere of firearms anywhere and everywhere restrains evil interference-they deserve a place of honor with all that is good."
                   George Washington
"America will never be destroyed from the outside. If we lose our freedoms, it will be because we destroyed ourselves."
                   Abraham Lincoln
All generalizations are false, including this one.
There's room for all God's creatures, right next to the mashed potatoes.
Billions of electrons were disturbed to bring you these messages.

What? No Eagles?
1968 Chebby Panel Wagon "Woodrow"
2008 Jeep Wrangler 4 Dr "The Javelina"
1967 Chevy 3/4 ton 4x4


<img src="http://banners.wunderground.com/weathersticker/miniStates_both/language/www/US/TX/Liberty_Hill.gif" border=0
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Offline mccastlej

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Re: Modified Vacuum line diagram for the 258
« Reply #14 on: October 16, 2006, 10:00:20 PM »
from what I could tell, the control solenoid for the Sol-Vac still needs to be connected, otherwise the sol-vac will be extended all the time?   

 

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