Vacuum Line Madness - JeepForum.com
 
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post #1 of 9 Old 09-30-2008, 02:24 AM Thread Starter
DThomas
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Vacuum Line Madness

What is the best way to just get rid of all those pesky vacuum lines on my stock 87 YJ and still have an engine that runs?!?

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post #2 of 9 Old 09-30-2008, 05:09 AM
JeeperDon
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They are only 'pesky' because you don't know how they work. Get a service manual (aftermarket or OEM), understand what the systems do, and fix any that are problematic.

'93 YJ, '02 GM 4.3V6, SOA, dual ARB's, 8.8+D30(WarnHubs), 4.88s, 35" BFG KM2s, AX15, NP231+4:1+SYE+2LO, York OBA, Warn M8000.
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post #3 of 9 Old 09-30-2008, 06:31 AM
Gunbunny
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Quote:
Originally Posted by DThomas View Post
What is the best way to just get rid of all those pesky vacuum lines on my stock 87 YJ and still have an engine that runs?!?


1. Carb change (MC2100, Weber, Holley, etc)
2. HEI
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post #4 of 9 Old 09-30-2008, 08:07 AM
brianOU
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MPI... i just ripped mine out last week, it was great.... spend 1.5 hr in a junkyard here, and so far i am up tp 300 dollars, and i have nearly everything i need. just have to get my wiring harness on.
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post #5 of 9 Old 09-30-2008, 10:22 AM
Jim93YJ
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Quote:
Originally Posted by JeeperDon View Post
They are only 'pesky' because you don't know how they work. Get a service manual (aftermarket or OEM), understand what the systems do, and fix any that are problematic.
^^^X2 Spend a little time researching all the lines and before you know it, it will all make sense like in the matrix when the vertically scrolling alpha-numeric characters turn into pictures for people who can interpret the code.

OR... there is also tons of info on getting rid alot of the emissions stuff:

http://www.jeepforum.com/forum/f12/ecm-removal-569016/
Attached Thumbnails
vac-mcu.jpg  

93YJ 4.8L Vortec,AX15,Atlas 4.3:1, 4.56 Gears, Dana 30 w/ Posi-lok,Dana 44 Rear w/ Ox Locker + 99 Explorer Disk Brakes,Tom Woods D. Shafts,1" Body, 2.5" ED RE Lift, 33" BFG KM2 T/A's with MT Classic II Wheels, Herculined Inside, Electric Fan, 20 Gal Tank Conversion,Tuffy Center Console,Warn Front Bumper, Rockhard 4X4 Rear Bumper w/ Tire Carrier,Bushwacker Extended Flat Fender Flares,AMSoil/Redline In Everything and the List Goes On....

AND...

88YJ 4.2L: Interior and mechanical overhaul including engine replacement, nutter bypass, Weber 34 Carb, and work on a whole bunch of other things to get it back to fine running condition without the emissions control...evap cannister kept functional as well as PCV system, and manifold heater.
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post #6 of 9 Old 09-30-2008, 10:23 AM
Jim93YJ
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And for the 4wd System.....
Attached Thumbnails
4wd Vacuum setup.jpg  

93YJ 4.8L Vortec,AX15,Atlas 4.3:1, 4.56 Gears, Dana 30 w/ Posi-lok,Dana 44 Rear w/ Ox Locker + 99 Explorer Disk Brakes,Tom Woods D. Shafts,1" Body, 2.5" ED RE Lift, 33" BFG KM2 T/A's with MT Classic II Wheels, Herculined Inside, Electric Fan, 20 Gal Tank Conversion,Tuffy Center Console,Warn Front Bumper, Rockhard 4X4 Rear Bumper w/ Tire Carrier,Bushwacker Extended Flat Fender Flares,AMSoil/Redline In Everything and the List Goes On....

AND...

88YJ 4.2L: Interior and mechanical overhaul including engine replacement, nutter bypass, Weber 34 Carb, and work on a whole bunch of other things to get it back to fine running condition without the emissions control...evap cannister kept functional as well as PCV system, and manifold heater.
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post #7 of 9 Old 09-30-2008, 10:54 AM
kloppk
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And anutha one...

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post #8 of 9 Old 09-30-2008, 11:00 AM
northjeep
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my vote is for the MPI.

-NorthJeep - >> Just Enough Essential Parts
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post #9 of 9 Old 10-04-2008, 05:51 AM
Cannon
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Readers digest version.
-Pull and cap it if it's related to emissions. It shouldn't apply anymore for your jeeps' age.
-Inspect & repair if its related to 4wd.

'90YJ Hard & Soft w/Full Drs; 4.2 Rebuild w/ Webber, 30x10.5; Interstate MegatronII D34; Mods: Rock Guards; Hi Lift Inst; Herc'd Tub, Front & Under; Elev Rear Seat; Scty CntrConsole/ Overhead&Rear Boxes; KC Lights-Fr & Rear; PA Sys; Gauges; Int Lts; Batt/Alt Cable; Heater Mods; 8K Winch, KargoMaster Rack w/Yak Megawarrior Basket; Ground Lights (4);Dumped - Optima Yellow after only 4yrs
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