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Thread: Hesitation at higher RPM's

  1. 12-20-2005, 01:10 PM #1
    sb_hbackDX
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    Question Hesitation at higher RPM's

    Hello everyone, I have a 86 hatch w/ the stock carb that has the vacuum mod and that 89' civic air box attached to create a CAI. This is the problem: I was accelerating (with WOT) and when I threw it into 3rd gear (i was at 3700-4000 RPM in 3rd) the car began to jerk, like bad. It sounded like a rev limiter was on the engine but i know thats not a feature. It was like "vroom,vroom,vroom..etc" with the jerks taking place at each vroom. Hahaha sounds retarted . The RPM's would stay at 3700 and then the car would jerk backward as if i was braking also...its quite strange. I was thinking that maybe its not getting enough fuel around those RPM's when both venturies(not sure how to spell it) are open. Because when I slightly press on the gas while accelerating(just opening one venturi) around the same RPM's and gear no jerking occurs. This has never happened before. What do yall think ? Thanks.
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  2. 12-20-2005, 03:48 PM #2
    VTEC_Inside
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    Re: Hesitation at higher RPM's

    Fuel filters?
    Honda, The Heartbeat of Japan...
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  3. 12-20-2005, 04:03 PM #3
    A20A1
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    Re: Hesitation at higher RPM's

    https://www.3geez.com/showthread.php?t=48568
    - llia

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  4. 12-21-2005, 05:25 PM #4
    sb_hbackDX
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    Question Re: Hesitation at higher RPM's

    Thank yall for the replys but Im still having a problem with hesitation, i checked for the loose venturies but both were tight as hell. Do you this its something dealing with fuel delivery? I know someone said something about this first off...All vacuum hoses are closed off and everything is tight. I adjusted the Fuel/Air screw so that less air and more gas would be avaliable and when i hit it it still jerked and lost power but not as bad...Anything would be a major help, thanks guys.
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  5. 12-21-2005, 07:14 PM #5
    VTEC_Inside
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    Re: Hesitation at higher RPM's

    The fuel/air screw is for the idle circuit only.
    Honda, The Heartbeat of Japan...
    2004 RSX Type S
    1989 Accord Coupe LX 5spd 2bbl
    Slushies are something to drink, not drive...
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  6. 12-21-2005, 07:33 PM #6
    sb_hbackDX
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    Re: Hesitation at higher RPM's

    yea i figured that...just wanted to test something out. do u think its fuel filters? Cuz i have two...
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  7. 12-21-2005, 07:35 PM #7
    VTEC_Inside
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    Re: Hesitation at higher RPM's

    It couldn't hurt if they haven't been changed in a while. They are relatively inexpensive and then you can rule them out.
    Honda, The Heartbeat of Japan...
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  8. 12-22-2005, 12:32 AM #8
    A20A1
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    Re: Hesitation at higher RPM's

    I just bypass the rear filter and run one up front... up to you.
    - llia

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  9. 12-22-2005, 12:13 PM #9
    sb_hbackDX
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    Lightbulb Re: Hesitation at higher RPM's

    Cool beans. Thanks for everything again but if for some reason its not the fuel filters do yall have any other suggestions so i could save time?
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  10. 12-22-2005, 01:59 PM #10
    Honda-Master
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    Re: Hesitation at higher RPM's

    chk the plugs and plug wires........cap. rotor.
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  11. 12-22-2005, 07:03 PM #11
    VTEC_Inside
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    Re: Hesitation at higher RPM's

    I guess its possible that the secondary diaphragm/thermovalve has developed a leak.
    Honda, The Heartbeat of Japan...
    2004 RSX Type S
    1989 Accord Coupe LX 5spd 2bbl
    Slushies are something to drink, not drive...
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