What's a Nutter Bypass? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > What's a Nutter Bypass?

Stainless Steel Door Hinge PinsPoly Door Hinge BushingsJK Front Lower Adjustable Control Arms!

Reply
Unread 04-05-2005, 12:52 PM   #1
ollietonk
Registered User
1986 CJ7 
 
Join Date: Feb 2004
Posts: 370
What's a Nutter Bypass?

Just curious, What is a nutter bypass? Finally got the Jeep driveable and I'm looking for something else to break. Everyone seems to like it, but what does it do and how do you do it? Thanks for any info

__________________
86' CJ7 (258 w/ Howell TBI, 33" ProComp MT's)
ollietonk is offline   Reply With Quote
Unread 04-05-2005, 12:58 PM   #2
Slipslap
Registered User
 
Join Date: Feb 2005
Location: Evans, GA
Posts: 315
I'm not the expert seeing how I just found out. But a search on google will help. But I think it removes most of the emission stuff off the carb I think. There should be a post down here that we just talked about it. jeepskate helped me out with it.
Slipslap is offline   Reply With Quote
Unread 04-05-2005, 01:05 PM   #3
Slipslap
Registered User
 
Join Date: Feb 2005
Location: Evans, GA
Posts: 315
Here ya go. at the bottom jeepskate gave some links. Those helped me understand it. Hope this helps.
http://www.jeepforum.com/forum/f8/258-carter-yf-timing-mixture-issues-147740/
Slipslap is offline   Reply With Quote
Unread 04-05-2005, 01:27 PM   #4
Geer_hed
Registered User
 
Join Date: Nov 2003
Location: Richmond, VA
Posts: 2,226
Archived Link to Nutter Bypass

off-road's copy

Dale's ignition mods page

The bypass takes the EECU out of the ignition loop and makes the Carter BBD Stepper Motor out of the feedback loop, eliminating irksome stepper interference with your idle and removing a single point of failure in the ignition loop. When my computer died, I went with the bypass instead of $140 to replace that POS...
__________________
[center][color=black][b]85 CJ7 / 258 / T176 / Dana 30/ AMC 20[/b][/color]
[url=http://www.geocities.com/cantwait_forviolence/]My Online Dumping Ground[/url][/center]
Geer_hed is offline   Reply With Quote
Unread 04-05-2005, 03:29 PM   #5
Dimension4
Registered User
 
Join Date: Sep 2004
Posts: 158
Does an edelbrock carb have a stepper?
Dimension4 is offline   Reply With Quote
Unread 04-05-2005, 03:50 PM   #6
Geer_hed
Registered User
 
Join Date: Nov 2003
Location: Richmond, VA
Posts: 2,226
No. Atleast not in the same sense as the Carter BBD. The carter stepper has needles that can adjust mixture based on realtime feedback from various sensors as translated by the EECU.

This is what it looks like:



It's on the back of the Carter BBD, as pictured here:



If you're running an Edelbrock, then the EECU is already out of the emissions loop.
__________________
[center][color=black][b]85 CJ7 / 258 / T176 / Dana 30/ AMC 20[/b][/color]
[url=http://www.geocities.com/cantwait_forviolence/]My Online Dumping Ground[/url][/center]
Geer_hed is offline   Reply With Quote
Unread 04-05-2005, 05:02 PM   #7
redlinedcj
Registered User
 
Join Date: Nov 2004
Location: Pittsburgh PA
Posts: 136
what years did the cj's have that?
redlinedcj is offline   Reply With Quote
Unread 04-05-2005, 06:11 PM   #8
ollietonk
Registered User
1986 CJ7 
 
Join Date: Feb 2004
Posts: 370
So with the MC2100, the stepper motor is already out of the picture. No nutter bypass for me Would this be correct.
__________________
86' CJ7 (258 w/ Howell TBI, 33" ProComp MT's)
ollietonk is offline   Reply With Quote
Unread 04-05-2005, 06:13 PM   #9
wm69
Registered User
 
Join Date: Jun 2003
Posts: 2,961
I did the MC2100 swap but I did the nutter anyway and noticed a smoother idle. Doing the nutter takes the ECU out of the ignition system too.........
__________________
85 CJ7 258, borla header, Team Rush, MC2100 ,optima batt, Warn 8274, agr super box 2 & pump, T5 w/ B&M shifter, centerforce 2, superior 1 piece axles, warn hubs 2.5 in lift, 31" BFG MT

85 CJ7 258, A/C, T176, MC2100, Team Rush, Warn XD8000i, superwinch hubs, 3in lift 31" BFG AT/KO
wm69 is offline   Reply With Quote
Unread 04-05-2005, 07:17 PM   #10
Jeep Daddy
Registered User
1985 CJ7 
 
Join Date: Jan 2002
Posts: 1,203
Quote:
Originally Posted by ollietonk
Just curious, What is a nutter bypass?
That's where you go to the hospital and they hook up a peanut butter pump directly to your stomach so you can get mass doses for a quick recovery. LOL
__________________
85 CJ7 4.0L/SM465/Dana300/AMC20/Dana30, MPFI,154K miles - 33" 12.5's Pro Comp MT's, one piece axles, Detroit Softlocker rear, Lock Rite front, Warn Hubs, 4.56 R&P, 4" BDS lift, Warn x8000i, Warn winch guard, Hi-Lift, Tuffy console, Four X Dr. rocker guards, Rock Hard sport cage, Kilby OBA with 1.75 gal tank and York 10.3cc compressor, Tube fenders by GenRight Offroad, Fabricated rear bumper and tire carrier.
Jeep Daddy is offline   Reply With Quote
Unread 04-05-2005, 08:14 PM   #11
gunkysputter23
Registered User
 
Join Date: Mar 2003
Posts: 170
Quote:
Originally Posted by redlinedcj
what years did the cj's have that?
82-86 I believe.
gunkysputter23 is offline   Reply With Quote
Unread 04-05-2005, 08:50 PM   #12
Geer_hed
Registered User
 
Join Date: Nov 2003
Location: Richmond, VA
Posts: 2,226
Quote:
Originally Posted by redlinedcj
what years did the cj's have that?
Production Jeep CJ didn't implement the Feedback System until 1983, but I've found that certain models (such as the California Emissions Package) started as early as 1981.

If you have the MC2100, the only thing the nutter does for you is take the EECU out of the pickup coil / Ignition Module chatter loop. If you're not too worried about Etesting, do it!
__________________
[center][color=black][b]85 CJ7 / 258 / T176 / Dana 30/ AMC 20[/b][/color]
[url=http://www.geocities.com/cantwait_forviolence/]My Online Dumping Ground[/url][/center]
Geer_hed is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.