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Unread 04-16-2014, 05:07 AM   #1
pdivico
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1986 CJ7 
 
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Wires...

Hi to everybody,
Itís a long time that I follow this forum without writing, I see a lot of good ideas here, thank you very much.
Now I would like to change my wiring harness with a new kit, What you recommend me? My Jeep now is without computer, and I have a Weber 38 and a DUI distributor. I want to clean a little bit all the wires that goes to anywhere.. and change de fuse block.

Sorry for my writing, Iím American but I live at Rome from 40 years..

CIAO

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Unread 04-16-2014, 05:11 AM   #2
Mike Romain
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I put a Centech harness in mine. It went in really easily. All the wires are marked and have the plugs and sockets already in place. It also had a dedicated ground system in it so you don't have to rely on fixture bolts or the tub for ground.
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
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Unread 04-16-2014, 06:24 AM   #3
82JeepCJ7
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Build your own so you don't add circuits and wires you don't need. All the kits have all the extra wires in them.
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Unread 04-16-2014, 06:28 AM   #4
Matt1981CJ7
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Quote:
Originally Posted by 82JeepCJ7 View Post
Build your own so you don't add circuits and wires you don't need. All the kits have all the extra wires in them.
I agree.

Also, you should consider hooking your PCV system up properly.

Matt
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Unread 04-16-2014, 06:31 AM   #5
kirbot
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I rewired my engine bay a little bit at a time. If you take it slow it isn't so overwhelming, and you can save a lot of money.

If you're doing it all at once though, I'd start with something like an EZ wiring kit. It's a generic kit meant to fit a lot of vehicles.
It'll cost about 1/3 of a Painless or a Centech, but still be easier than starting from scratch.
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Unread 04-16-2014, 10:35 AM   #6
Tigerjeep79
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A couple of years ago my wife gave me a Painless kit for Christmas. Coupled with the DUI distributor, it really cleaned up the engine compartment.
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Unread 04-17-2014, 01:53 AM   #7
pdivico
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Thanks to everybody,
Probably I try to change the wire once at time, can I use the wire a little bit bigger or I have problems with the resistance? Also for Matt, what happen on my PCV system is something wrong?

CIAO
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Unread 04-17-2014, 02:34 AM   #8
grnd93
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It would appear your PCV valve has been removed and replaced with regular crankcase breathers. I wouldn't worry about it
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Unread 04-17-2014, 05:04 AM   #9
John Strenk
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Quote:
Originally Posted by grnd93 View Post
It would appear your PCV valve has been removed and replaced with regular crankcase breathers. I wouldn't worry about it

even the early '60s vehicles had road draft tubes to suck the fumes out. Not just vents. He really needs something to draw the fumes out.
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Unread 04-17-2014, 06:17 AM   #10
Matt1981CJ7
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Quote:
Originally Posted by pdivico View Post
Thanks to everybody,
Probably I try to change the wire once at time, can I use the wire a little bit bigger or I have problems with the resistance? Also for Matt, what happen on my PCV system is something wrong? CIAO
As John said, the system is designed to circulated fresh air in and dirty air out.

The rear hole in the valve cover is the fresh air intake. The front hole contains a PCV that is connected to manifold vacuum.

Go here for a more detailed explanation.

Matt
vac-pcv.png

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Unread 04-17-2014, 06:23 AM   #11
82JeepCJ7
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PCV systems suck.....
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Unread 04-17-2014, 08:34 AM   #12
pdivico
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So Matt if I want to do the correct thing I need to put the PCV from the carburetor and the other I leave go to the canister like the pic under, it’s right?
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Unread 04-17-2014, 08:50 AM   #13
Matt1981CJ7
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Quote:
Originally Posted by pdivico View Post
So Matt if I want to do the correct thing I need to put the PCV from the carburetor and the other I leave go to the canister like the pic under, it’s right?
Not exactly.

The little filter on the rear of the valve cover can remain, since you no longer have the factory air cleaner setup. You need to replace the little filter on the front of the valve cover with the correct PCV valve, then connect it to a manifold vacuum source at the carb.

Matt
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Unread 04-17-2014, 08:53 AM   #14
Mike Romain
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The front hole in the cover goes to the base of the carb area, it is suction out and needs a manifold port. The small air filter in the back hole is OK, that is the air into the crankcase.

This flow is needed to keep condensation out of your engine.
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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Unread 04-17-2014, 10:41 AM   #15
grnd93
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Quote:
Originally Posted by John Strenk
even the early '60s vehicles had road draft tubes to suck the fumes out. Not just vents. He really needs something to draw the fumes out.
Plenty of vehicles (mostly in performance applications) do just fine with 2 breathers. One of the purposes is to relieve crankcase pressure caused by combustion gas blow-by past the piston rings.
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