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

Carb question

Discussion in 'Early CJ5 and CJ6 Tech' started by alleycat3677, Oct 16, 2015.

Page 2 of 3
  1. alleycat3677

    alleycat3677 Member

    I'll run this one till she gets put away for winter. Don't want the NY salt eating her frame. Next spring when she comes out to play I'll have a nice newly reconditioned,proper 2G waiting for her. Plus I'm curious to see what the pertronix does. I never set dwell. Just gapped the points.
     
    alleycat3677, Oct 17, 2015
    #21
  2. uncamonkey

    uncamonkey Member

    I still have all of the old tune up stuff in the garage and the Pertronix set up was worth the $ on my 185K mile V6 motor in the 3B.
     
    uncamonkey, Oct 17, 2015
    #22
  3. Glenn

    Glenn Kinda grumpy old man Staff Member

    Did you determine that there is vacuum hose being used and not fuel hose? What I meant was that manifold vacuum can suck fuel hose closed thereby pinching off the vacuum supply to your distributor advance and maybe that was messing with the engine.
     
    Glenn, Oct 17, 2015
    #23
    Wirework likes this.
  4. alleycat3677

    alleycat3677 Member

    I didn't look. The advance works as it should. If it was collapsing wouldn't it not advance?
     
    alleycat3677, Oct 17, 2015
    #24
  5. Glenn

    Glenn Kinda grumpy old man Staff Member

    If it's advancing as it should then I'm sure it's fine.
     
    Glenn, Oct 17, 2015
    #25
  6. Alan F

    Alan F Sponsor

    Does the hose off the back of the carb go to a PCV valve? If it is jus plumbed to the valve cover its a huge vacuum leak which would account for your symptoms.
     
    Alan F, Oct 18, 2015
    #26
  7. alleycat3677

    alleycat3677 Member

    Does it need the pvc valve or can I just plug it and get a breather. I don't know what the valve does!
     
    alleycat3677, Oct 18, 2015
    #27
  8. Glenn

    Glenn Kinda grumpy old man Staff Member

    Correct way is with the PCV vale, which is a metering valve. Enough restriction built in so it only takes a little bit of vacuum to ventilate the crankcase and not create a vacuum loss as Alan F. mentioned.
     
    Glenn, Oct 18, 2015
    #28
  9. Focker

    Focker That's a terrible idea...What time? Staff Member

    From this thread - Link - V6 Air Cleaner Options

    Well I ended up making my own spacer for $3 out of an exhaust pipe connector from AutoZone. The parts guy thought I was a weirdo. I had my air cleaner in hand but was playing around in the exhaust area. I love one offs!
    [​IMG]

    It's not pretty but it works great. I used my grinder and a 4-1/2" cut off wheel.
    [​IMG]

    I basically cut slits all the way around, folded every other tab one in and out. I cut off the outer tabs to make a lip for the air cleaner to sit on.
    [​IMG]

    The bottom of the air cleaner housing.
    [​IMG]

    The inner tabs snap inside perfectly...It actually makes a snap sound.
    [​IMG]

    Plenty of clearance.
    [​IMG]

    Don't do both of these at the same time.

    Look in the pic I posted...You can do what I did. I have the PCV valve installed but not plumbed...No issues.

    A lot of advice to rebuild the carb is posted or to check/replace the accelerator pump or check balls. A common response is 'it's fairly new accelerator pump". Counter response..."Check it anyway"...Final response..."It was the accelerator pump after all". So that being said...

    Pull the carb, clean it and check the accelerator pump.

    More info here - 2 Jet Runs Better With Choke On Plus HEI Issue
     
    Focker, Oct 18, 2015
    #29
  10. alleycat3677

    alleycat3677 Member

    I love it. Great idea and great job. I'll be doing this. So having the pvc valve just there and not plumbed doesn't hurt anything?
     
    alleycat3677, Oct 18, 2015
    #30
  11. Focker

    Focker That's a terrible idea...What time? Staff Member

    Just environmentalists.
     
    Focker, Oct 18, 2015
    #31
  12. alleycat3677

    alleycat3677 Member

    What size exhaust adapter did you use???
     
    alleycat3677, Oct 18, 2015
    #32
  13. Focker

    Focker That's a terrible idea...What time? Staff Member

    I don't remember...I think it will vary depending on your air cleaner. Take it to the parts house with you.
     
    Focker, Oct 18, 2015
    #33
  14. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    No PCV valve is fine if you want to go back to how they vented the crankcase in the 1920s.

    It's such a simple, effective and low-maintenance system, why would you eliminate it? You need to vent the crankcase vapors somewhere, and if you leave the crankcase open to the atmosphere you admit dirt and moisture and potentially vent oil mist - not good for your engine and messy. Lower emissions is a free bonus - Jeep was using a PCV system long before it was required by emissions standards.
     
    Last edited: Oct 18, 2015
    timgr, Oct 18, 2015
    #34
  15. termin8ed

    termin8ed I didn't do it Staff Member

    Pcv;)
    Positive
    Crankcase
    Ventilation
     
    termin8ed, Oct 18, 2015
    #35
  16. alleycat3677

    alleycat3677 Member

    I left it!! Just tightened everything up with some hose clamps!
     
    alleycat3677, Oct 18, 2015
    #36
  17. alleycat3677

    alleycat3677 Member

    After giving this a ton of thought,I'm wondering if my stalling out when I slow down could be a bad power valve. Not allowing the bowl to fill properly at speed and starving it for fuel. Any thoughts? When I put her away for winter I'm going to pull the carb,take it all apart and soak it! Can't hurt. She sat for a while so she could be all gummed up!
     
    alleycat3677, Oct 19, 2015
    #37
  18. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Might be the opposite - running too rich will hardly show at speed, but can flood/choke out an engine at idle. You did say you were giving it half choke too.
     
    PeteL, Oct 19, 2015
    #38
  19. alleycat3677

    alleycat3677 Member

    Installed Pertronix ignition,timed her up and drove her. No more stalling out when I brake. Who knows but I'll take it. Now on to cosmetic stuff. Thanks all!!
     
    alleycat3677, Oct 20, 2015
    #39
  20. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Sounds like maybe it just needed the points cleaned and set.
     
    PeteL, Oct 20, 2015
    #40
Page 2 of 3