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Ok, I Am Officially Getting Tired Of This Crap

Discussion in 'Early CJ5 and CJ6 Tech' started by mickeykelley, Nov 3, 2021.

  1. Nov 5, 2021
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
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    I will. Plan is to do some more driving with Willie today. Unfortunately, I haven’t found any true gas up here yet to see if that would help. There is a place back in Texas so next trip I’ll be bringing some Jerry can up with it.
     
  2. Nov 6, 2021
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
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    So today I pulled the carb horn so if it happened I could see inside the throat. We took a ride up and down hills, thru the forest to grammas house. It was even a little warmer since we headed out at lunch time. And an hours worth of driving and no issue. This is the crap I’m tired of. Doesn’t happen, then does, then doesn’t. In fact ran very well. Do some more tomorrow.
     
  3. Nov 6, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Hills of NH
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    Checked the air filter/oilbath?
     
  4. Nov 6, 2021
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Besides the air horn did you do anything different? Added gas? Talk sweet to it? Threaten to shoot it?
     
    dozerjim, Andrew Theros and Fireball like this.
  5. Nov 6, 2021
    mickeykelley

    mickeykelley Well-Known Member

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    Checked the oil bath several weeks ago and if it were that, I would think it would happen all the time, not wait 5 mins then go. Did absolutely nothing else. Didn’t even talk nice or threaten, or anything. Going to venture further tomorrow.
     
    Glenn likes this.
  6. Nov 7, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Hills of NH
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    One crazy thing that happened to me one time was squirrels or mice filled the muffler with acorns. Would start and run, but then choke from the back pressure - then rinse and repeat. A plugged catalytic will do similar. High altitude would aggravate the effect with rich mixture.

    Observing a manifold vacuum gauge during your trouble cycles might be interesting.
     
    dozerjim likes this.
  7. Nov 7, 2021
    Lockman

    Lockman OK.....Now I Get It . 2022 Sponsor 2021 Sponsor 2020 Sponsor

    White City, NY 14617
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    I agree...... Sound's like your starv'n for fuel , Air , or both , Doesn't it ? :confused:
     
  8. Nov 7, 2021
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2021 Sponsor 2020 Sponsor

    Bozeman, MT
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    I am still thinking weak fuel pump...they die slowly and inconsistently. Test for both pressure and volume? Is yours like the v6 in that a leaky pump diagram will put gas into the oil?
     
  9. Nov 7, 2021
    duffer

    duffer Rodent Power

    Bozeman, MT
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    Not likely the case here, but I had a 1960 Benz 190Db (diesel) that exhibited similar antics. It would die. Pull over, open the hood, everything looks normal and it would start right up. Hit the road and repeat. The problem? A slightly loose hood blanket that would get sucked into the air cleaner intake when you closed the hood and reached some level of intake vacuum.
     
    PeteL likes this.
  10. Nov 7, 2021
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    A friend of mine in high school had a 3B that would just quit running, or at least almost quit. Turned out to be a rag in the gas tank that would float around and sometimes cover the fuel outlet.
     
    Rick Whitson likes this.
  11. Nov 7, 2021
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
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    No gas in oil. Checked that plus I think that would have happened back in Texas.
     
  12. Nov 7, 2021
    mickeykelley

    mickeykelley Well-Known Member

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    Suspected that too and don’t see anything floating at the bottom, but game plan is to run it almost dry to get a better look.
     
    Glenn likes this.
  13. Nov 7, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    I was certain I had something similar, but it was a dirty filter, which as I said was only a problem under heavy load.
     
    Glenn likes this.
  14. Nov 8, 2021
    mickeykelley

    mickeykelley Well-Known Member

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    Well, let’s add some more to this after today. Didn’t get a chance to go for a drive yesterday. Willie is parked on level ground back in Texas and here in NM, but Saturday I backed him up on a slight incline to get him out of the way of the circle driveway. The incline was not anything big but you could see the slope to the front. So today I went to run an errand so jumped in and he just turned over and over but no start. But by now he had rolled down in the middle of the drive, blocking our main vehicle. So I popped the hood and no gas in the carb, but I could see it in the filter bulb. I took off the clamp to get a little gas in a cup to prime the carb. The amount left in the hose was minimal going from the pump IN back to the filter bulb, so I tilted the filter over and gas flowed freely. So from the tank, thru this filter bulb, it flowed fine. So that tells me no clogs in the tank or filter. I put it back together and poured some down the carb as I shorted across the solenoid. It tried to run each time and after a three attempts, he fired up and idled smoothly. Ran my errand with no issues. So normally, if I start him every 3-4 days max and he fires right up. The only time the carb dries out is if I let him sit for 10 days to 2 weeks.

    This all gives me more of a move to install an electric pump, but that is really just doing a bandaid. But why would it dry/drain back or whatever so quickly. While I was initially thinking classic vapor lock, I’m really now leaning towards something in the fuel pump. Thoughts?
     
  15. Nov 8, 2021
    Glenn

    Glenn Kinda grumpy old man Staff Member

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    What carb. is on the Jeep? YF or Solex?
     
  16. Nov 9, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    A tiny speck of crap in one of the check valves will mess up a fuel pump.

    If you disconnect the line at the carb, you then could verify both static pressure and delivery volume. Both matter.
     
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  17. Nov 9, 2021
    Lockman

    Lockman OK.....Now I Get It . 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    At Least you've found that your starv'n for Fuel........
     
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  18. Nov 9, 2021
    Geo

    Geo New Member

    road island
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    Curious about your spark plugs, wonder if they color differently at altitude. I'd think if mixture richens, plugs would get darker.
    Hopefully addressing your fuel pump issues will cure the stalling.
     
  19. Nov 9, 2021
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2021 Sponsor 2020 Sponsor

    Bozeman, MT
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    dying fuel pumps are kind of persnickety...and I found change in elevation made it worse. For quite a few months, it only had problems when i was up at high elevation in the mountains, then when i would come back down to Denver, it was fine. After quite a few months, it started having some issues at WOT on the highway in Denver, and i started noticing fuel in the oil....I initially did pressure tests, and it was fine, but it turned out to be a fuel volume issue. It also seemed to drain back through the check valve as the fuel bowl was always dry after a couple days.
     
  20. Nov 9, 2021
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    IMO most likely a dry bowl comes from evaporation rather than drain-back. The big Jeeps mostly have the 2100 or 2150 and dry bowl is almost universal after a week or two. An open element air cleaner makes it much worse. The factory air cleaners in the later vehicles shut to trap fuel bowl evaporation and send it to vapor recovery, and this makes dry bowl much less of an issue. Altitude will make it worse too, since the higher vapor pressure of the fuel speeds evaporation.
     
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