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Thread: Humidity

  1. #1
    3Geez Veteran russiankid's Avatar
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    Humidity

    So lately there has been very high humidity here, and every morning i put the key into the ON position like usual for about 3 secs, then i pump the gas 2 times and start it. Lately it will start but 3 secs later it dies, then you try about 2 more times to crank it and it will catch but die. Then the next crank it starts. The car does stay outside but wtf?
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)



  2. #2
    3Geez Veteran MessyHonda's Avatar
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    Re: Humidity

    you press the gas alot to open the choke right?

    1989 Honda Accord LX-i
    B18c1 swap since 7/2011
    175whp and 132tq
    Redzone tuned

  3. #3
    3Geez Veteran russiankid's Avatar
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    Re: Humidity

    Quote Originally Posted by MessyHonda
    you press the gas alot to open the choke right?
    Usually i pump the gas all the way to the floor twice, if i do it once it wont start, twice it starts.
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)

  4. #4
    3Geez Veteran A18A's Avatar
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    Re: Humidity

    the 2nd time you pump it, try holding it down instead maybe. thats what i do, starts 1st pop, if i just turn the key without assisting the throttle it takes about 2 whole seconds to start

  5. #5
    3Geez Veteran russiankid's Avatar
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    Re: Humidity

    Quote Originally Posted by Overdosed A18A
    the 2nd time you pump it, try holding it down instead maybe. thats what i do, starts 1st pop, if i just turn the key without assisting the throttle it takes about 2 whole seconds to start
    It starts on the first second just it dies after a few secs.
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)

  6. #6
    3Geez Veteran MessyHonda's Avatar
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    Re: Humidity

    Quote Originally Posted by russiankid
    It starts on the first second just it dies after a few secs.

    it only happens to me like that when its real cold...it like revs to like 2500 rpm and then it dies....but if you hold the gas it makes it work....idk...if you have no emissions ....its time to get a weber..lol unless a20a1 can help you.

    1989 Honda Accord LX-i
    B18c1 swap since 7/2011
    175whp and 132tq
    Redzone tuned

  7. #7
    3Geez Veteran russiankid's Avatar
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    Re: Humidity

    Quote Originally Posted by MessyHonda
    it only happens to me like that when its real cold...it like revs to like 2500 rpm and then it dies....but if you hold the gas it makes it work....idk...if you have no emissions ....its time to get a weber..lol unless a20a1 can help you.
    It only happens when its very humid, so i'll stay with this carb. And i don't have emissions here.
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)

  8. #8

    2oodoor's Avatar
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    Re: Humidity

    Quote Originally Posted by russiankid
    It only happens when its very humid, so i'll stay with this carb. And i don't have emissions here.
    Try a little high octane fuel every now and then. Just enough to keep some in the tank , it will upgrade the rest of the fuel. Check your distributor cap and rotor button, Humidity reeks havoc on sloppy secondary connections.

  9. #9
    3Geez Veteran russiankid's Avatar
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    Re: Humidity

    I found the problem. The vent valve that prevents the fuel to evaporate when the engine is off wasn't holding vacuum, so fuel would evaporate out of the fuel bowl. So i took a spare carb i have, and the valve holds vacuum, so swapped them out and everything is fine now.
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)

  10. #10

    2oodoor's Avatar
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    Re: Humidity

    Quote Originally Posted by russiankid
    I found the problem. The vent valve that prevents the fuel to evaporate when the engine is off wasn't holding vacuum, so fuel would evaporate out of the fuel bowl. So i took a spare carb i have, and the valve holds vacuum, so swapped them out and everything is fine now.
    weird, never heard of that in US in December, only when temps reach 90 and above.

  11. #11
    3Geez Veteran russiankid's Avatar
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    Re: Humidity

    Quote Originally Posted by roodoo2
    weird, never heard of that in US in December, only when temps reach 90 and above.
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)

  12. #12
    DX User gosse's Avatar
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    Re: Humidity

    ok thanks that im gonna try ones?? have the same problem..

  13. #13
    3Geez Veteran russiankid's Avatar
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    Re: Humidity

    Quote Originally Posted by gosse
    ok thanks that im gonna try ones?? have the same problem..
    You need to look under the airbox(i unscrewed mine to lift it a bit). Right under it on the belt side of the engine you will see a big black hose with a clamp and a vacuum line connection to the carburetor, that valve closes when the engine is off so fuel doesn't evaporate. Go to the junkyard and bring a hand held vacuum pump, and find one that holds vacuum. But first, test yours with a vacuum pump, it should hold vacuum if it works, if it doesn't then you need to replace it. Also if you do end up replacing it, replace the gasket on there as well. The gasket is a pain to get on but it gets on there. One thing tho is you cannot rebuild these little valves.
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)

  14. #14
    DX User gosse's Avatar
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    Re: Humidity

    What engine type do you have, i dont think mine have that valve, but looks like there's missing a diaghram on the belt side og the main throttle shaft, so maybe there should be one!! but if your engine type's the same i gota go the manual after to see if i've missing something... because the problem you have, i have tryed to get by by turning the key to drive position and off three times and i have to pump the gas 3 times i it's like it starts as it gonna ..

  15. #15
    3Geez Veteran russiankid's Avatar
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    Re: Humidity

    i have the A20A1
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)

  16. #16
    DX User gosse's Avatar
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    Re: Humidity

    ok mine is a a20a2.. maybe theres the difference... and then theres the kx,ky and other models... thats a jungle.. but, i know we have the same bowl breather tube..

  17. #17
    3Geez Veteran russiankid's Avatar
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    Re: Humidity

    Quote Originally Posted by gosse
    ok mine is a a20a2.. maybe theres the difference... and then theres the kx,ky and other models... thats a jungle.. but, i know we have the same bowl breather tube..
    Sam


    1989 Accord LX: Sold with 208k-now somewhere around 230k with new owner

    Current:
    2014 Elantra Sport 6MT
    2000 Montero Sport 4x4 (beater, trail rig)

  18. #18
    DX User gosse's Avatar
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    Re: Humidity

    ha ha.. yep dont understand it either...
    just said, theres plenty of models and variations..

  19. #19

    A20A1's Avatar
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    Re: Humidity

    No you don't have that part for the fuel vapor... so there is just a flat metal plate with 2 screws that close the hole on the side of the carb where the vent should be.
    - llia


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