User Tag List

Results 1 to 5 of 5

Thread: any nutter bypass experts on here?

  1. #1
    Senior Member Sr. Beaver's Avatar
    Join Date
    Jan 2010
    Location
    Mankato
    Posts
    1,959

    Branch
    Army National Guard
    Status
    Served
    Served
    1996 to Present

    Closest Installation

    Fort McCoy
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Default any nutter bypass experts on here?

    So I just finished doing the nutter bypass and replaced the electronic Carter BBD with a known good non-electronic Carter BBD. Starts and runs fine until under load, set timing at 8* as all the interweb instructions directed. As I understand it hooking the dist to the ported vacuum off the right side of the carb should make it a vacuum/mechanical advance, but I can not get it to quit pinging under medium to hard acceleration, as long as I go easy on the throttle all is good up to about 60 after that it starts to ping. Advance not working?
    That's what I'm thinking, just need a sounding board.

    Thanks in advance
    Only the dead have seen the end of war - Plato

    I don't always go full retard, but when I do I take the Jeep...

    Money can't buy Happiness, But it can buy BACON, close enough!!!


    Quote Originally Posted by gearhead1985 View Post
    i think i r druck and will rechecck in the morning





    ___/l ,[____],
    l----------L OllllllO-
    ()_)-----()_)-o-)_)

  2. #2
    Senior Member HillBillE's Avatar
    Join Date
    Jan 2008
    Location
    Duluth, MN
    Posts
    13,934

    Branch
    Army
    Status
    Served
    Served
    1985 to 1998

    Closest Installation

    Fort McCoy
    Mentioned
    68 Post(s)
    Tagged
    0 Thread(s)

    Default

    I'd check the advance at the dizzy, and check for any vacuum leaks on the carb and intake.

    I had the same problem when I did it on mine, turned out to be the brand new HEI distributor from 4WDH. It was a piece of junk!

    I have done 4 nutter bypasses, and mine was the only one with major problems. I used an MC2100 carb that I rebuilt, and the new dizzy. I went nuts, never thinking a brand new dizzy would be bad.


    As long as the people remain armed,
    government knows that it cannot rule over the people by force.
    Those who stand in defiance of unconstitutional laws
    do so out of duty, honor, oath and love of country.


    "Certified Jeep Junky!"


  3. #3
    Junior Member genesbro's Avatar
    Join Date
    Aug 2010
    Location
    Clinton
    Posts
    329

    Branch
    Navy
    Status
    Served
    Served
    1974 to 1983

    Closest Installation

    Tinker AFB
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    You might try putting a vaccum pump like a mighty vac on the distributor vac line with it running and the timing light attached and see if it makes a diff. If it does then make sure that port on the carb has vac at it again using the mighty vac again this time just as a gauge. Good luck
    I have not yet begun to fight. John Paul Jones

  4. #4
    Junior Member texascj's Avatar
    Join Date
    Jan 2008
    Location
    Todd Mission, TX
    Posts
    344

    Branch
    Army
    Status
    Retired
    Served
    1984 to 2005

    Closest Installation

    Fort Hood
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by HillBillE View Post
    I'd check the advance at the dizzy, and check for any vacuum leaks on the carb and intake.

    I had the same problem when I did it on mine, turned out to be the brand new HEI distributor from 4WDH. It was a piece of junk!
    Same problem I had with the 4WD dizzy. POS for sure. Yeah, check for vac leaks after you replace all the vac lines if you haven't already. Underhood heat will kill a line quicker than you think with very very small cracks and the like.
    81 CJ7, 30 over 258, did the Weber thing now I'm going with a Howell injection kit, 2.5 lift, SRS, and the all important M998 instrument panel with Equus gages. Also have a 71 AMC 360 to rebuild when I kill the 258.

  5. #5
    Senior Member Sr. Beaver's Avatar
    Join Date
    Jan 2010
    Location
    Mankato
    Posts
    1,959

    Branch
    Army National Guard
    Status
    Served
    Served
    1996 to Present

    Closest Installation

    Fort McCoy
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Default

    Well not only did i find a vacuum leak (intake gasket) also the "ported" vacuum that I hooked the dizzy up to was does not supply vacuum at all, along with the big one that's supposed to be manifold vacuum, rebuild kit should take care of them issues and on to the next disaster of pulling the driveline apart to find out how badly the PO has neglected it
    Only the dead have seen the end of war - Plato

    I don't always go full retard, but when I do I take the Jeep...

    Money can't buy Happiness, But it can buy BACON, close enough!!!


    Quote Originally Posted by gearhead1985 View Post
    i think i r druck and will rechecck in the morning





    ___/l ,[____],
    l----------L OllllllO-
    ()_)-----()_)-o-)_)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Get the MJ Supporter Membership for a little less than $0.06 a day and get more space, 2 MJ Stickers and no banners ads. [Check it out]