1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Idle RPMS for 225 V6

Discussion in 'Early CJ5 and CJ6 Tech' started by Hooker, Jan 17, 2008.

  1. Jan 17, 2008
    Hooker

    Hooker Hookers do it in the rear

    Ft Hood/ San...
    Joined:
    Dec 19, 2007
    Messages:
    88
    What should my Idle RPM's be for my 71 V6 225? They are ranging around 1000 to 1200 at idle no matter if the engine is warm or not....:flag:
     
    Hooker, Jan 17, 2008
    #1
  2. Jan 17, 2008
    grannyscj

    grannyscj Headed to the Yukon

    Anchorage, AK
    Joined:
    Dec 19, 2005
    Messages:
    1,758
    650 rpm
     
    grannyscj, Jan 17, 2008
    #2
  3. Jan 17, 2008
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
    Joined:
    Sep 10, 2003
    Messages:
    2,084
    factory book says 700. mine won't idle below that.
     
    66cj5, Jan 17, 2008
    #3
  4. Jan 17, 2008
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    I've got something somewhere that says 650 as well I thought.

    Mine will idle down at 500 RPM in the summer.
     
    sparky, Jan 17, 2008
    #4
  5. Jan 17, 2008
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
    Joined:
    Sep 22, 2002
    Messages:
    5,349
    My underhood decal says 650rpm, I set mine at 700 rpm. 650rpm makes the engine idle a little to rough.
     
    Mcruff, Jan 17, 2008
    #5
  6. Jan 17, 2008
    Hooker

    Hooker Hookers do it in the rear

    Ft Hood/ San...
    Joined:
    Dec 19, 2007
    Messages:
    88
    OK then!!! I have already messed with the idle set screw. where are the idle mixture screws on my factory carb? do i tune that just like i would on a SBC with a vacuum gauge?
     
    Hooker, Jan 17, 2008
    #6
  7. Jan 17, 2008
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Front of the carburetor.

    Yes, tune it with a vacuum gauge like any other engine. Mine for sure runs better being tuned in that fashion.
     
    Last edited: Jan 17, 2008
    sparky, Jan 17, 2008
    #7
  8. Jan 17, 2008
    Hooker

    Hooker Hookers do it in the rear

    Ft Hood/ San...
    Joined:
    Dec 19, 2007
    Messages:
    88
    thanks guys.... i will attempt to do that this weekend... the high here in KY is 24 this weekend.....
     
    Hooker, Jan 17, 2008
    #8
  9. Jan 17, 2008
    Hooker

    Hooker Hookers do it in the rear

    Ft Hood/ San...
    Joined:
    Dec 19, 2007
    Messages:
    88
    also can i use my engine to down shift to slow my jeep down like i can with my trucks?
     
    Hooker, Jan 17, 2008
    #9
  10. Jan 17, 2008
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Yes
     
    sparky, Jan 17, 2008
    #10
  11. Jan 17, 2008
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
    Joined:
    Mar 29, 2007
    Messages:
    5,925
    Also note that you need to be slow idle 650-700 to set timing. If that is not correct it can keep your RPM's high. Carb adjustments are to be made (should be) with vacuum gauge at slow idle. I think i'm correct. If not, I'll hear about it. he he.
     
    Walt Couch, Jan 17, 2008
    #11
  12. Jan 18, 2008
    trickpatrick

    trickpatrick Done? LOL

    North Idaho USA
    Joined:
    Nov 29, 2006
    Messages:
    838
    Yep.

    Could be timeing combined issue.
    I would look for vacume leak first get that out of the way.

    If still too high then back off the dissy abit and see if it goes down.
    Should then adjust carb abit till you can low idle.
    Then set timeing. then adjust carb again till best low idle and vacume setting.
    IMHO shadetree mech.:)
     
    trickpatrick, Jan 18, 2008
    #12
New Posts