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Unread 10-22-2007, 04:52 PM   #1
smitkev2
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This is a Picture Guide to Nutter Bypass

If your anything like me, not mechanically inclidned, then hopefully you'll appreciate my process of the nutter bypass. This seemed way over my head, but this is the easiest thing you can really do to help the performance. My jeep '90 4.2 increased beyond my expectations.

I have never done anything remotely similar to this. This took me 4 hours because I was VERY methodical in what I was doing, tracing wire 3 times to make sure, checking the link (in step 1) 4 & 5 times before I cut a wire "just to make sure" I really didn't want to screw the pooch on this. I did it with 100% success

The most time consuming and problematic part of the enitre process is getting the wires back in the loom. Which is the most mindless part, which is good!

Seriously, ANYONE can do this! If I can do it... YOU can do it.













Last edited by smitkev2; 05-29-2013 at 06:54 AM.. Reason: update photo links, removed old links.
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Unread 10-22-2007, 05:02 PM   #2
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Unread 10-22-2007, 05:49 PM   #3
wizard
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nutter

this is a great post and should be considered as a sticky great job on the pictures and explaining everything.
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Unread 10-22-2007, 06:15 PM   #4
sam.b.
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exactly what i was looking for
i vote for a sticky as well
to whoever wrote this great step by step instructions
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Unread 10-22-2007, 06:20 PM   #5
89YJmoneypit
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Good pics When I did the nutter on my old 4.2, I just ran 2 new wires along the firewall from the distributor to the ICM and didn't bother messing around with the loom. It's a lot easier that way, if you're not real worried about making it look stock.
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Unread 10-22-2007, 06:56 PM   #6
kharmajavah
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Quote:
Originally Posted by 89YJmoneypit
Good pics When I did the nutter on my old 4.2, I just ran 2 new wires along the firewall from the distributor to the ICM and didn't bother messing around with the loom. It's a lot easier that way, if you're not real worried about making it look stock.
Same with me. I can always go back and wire them back into the loom pretty quickly if necessary.

I'd say sticky this thing...I would have worried a LOT less if I had this to work from.
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Unread 10-22-2007, 08:43 PM   #7
hdfxrs91
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Excellent post. Can I make one suggestion? Instead of pulling all those wires from the loom, just go up about halfway between the distributor and the firewall, and look in the loom. You'll see the orange/purple pair twisted in there. Just pull out a few inches and splice there. I took two 16-gauge wires and twisted them lightly, then stuffed them in the loom. I found it easier to put the two wires in instead of the whole thing. I unsnapped the loom holders one at a time as I fed the wires in.
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Unread 10-23-2007, 06:32 AM   #8
smitkev2
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Thanks for the positive feedback, I didn't really know what the wires did in the loom but now that I know they are twised and go into the firewall, it would be easier to cut them closer to the dist. plug rather than pulling the enitre loom off. But I've seen posts where people ran into a problem of the wires changing colors on them. So I just wanted to be sure of what I was cutting. I would definitly trade a little more work putting the wires back in the loom to ensure that I did cut the right wires and did all this correctly.

Thanks guys, really good tips coming through. If you have more tips please post them, I really could have used this post last Sunday too. How do you propose this as a sticky?
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-- Picture Guide to Nutter Bypass --

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Unread 10-23-2007, 06:58 AM   #9
rustywrangler
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I do not think this should be a sticky souly because the sticky pile is getting big. HOWEVER, I do think that this should be added to the FAQ section.


Excellent writeup man.
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Unread 10-23-2007, 07:02 AM   #10
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Quote:
Originally Posted by smitkev2
How do you propose this as a sticky?


It has been done already. Just waiting for a response. None of the YJ mods are on right now.

Rusty
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Unread 10-23-2007, 08:20 AM   #11
jbolty
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There is a technical write up section too. This would find a good home there.
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Unread 10-23-2007, 10:23 AM   #12
saxsan
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What is a nutter bypass?
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Unread 10-23-2007, 10:27 AM   #13
rustywrangler
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Quote:
Originally Posted by saxsan
What is a nutter bypass?

is your friend.... It basically bypasses the ignition controls of the dist etc.


http://www.4x4wire.com/jeep/tech/ele...jn-ignition99/
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Lydia Ann-Acquired 08/05/05 Open Heart surgery 08/10/05
Jacob Patrick-Acquired 01/17/08 Open Heart surgery 02/15/08
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Unread 10-23-2007, 01:00 PM   #14
kharmajavah
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Quote:
Originally Posted by saxsan
What is a nutter bypass?
Bypasses the computer in the 4.2, like he said.

But, since you have the 2.5, you needn't worry. No crappy spaghetti maze of emissions hoses to wade through
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Unread 10-24-2007, 04:04 PM   #15
YJ-Jammer
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does it make the 4.2 run better?? And what gains can you get from it?
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