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Thread: fluctuating RPM 7th Gen Civic

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    Default fluctuating RPM 7th Gen Civic

    Hi All!

    Car - Honda Civic VTi 2004 A/T
    Mileage - 90k
    CNG - Never installed
    Services recently done - Tuning, throttle body cleaned, injectors cleanee, plugs changed, fuel filter changed.

    Issue - RPM isn't stable on idle. Fluctuates slightly. Pendulums between 750-850.

    Other syntoms - slightly sluggish. Drops RPM to 0 and shuts down the car when started in the morning.

    For every positive reply you post, FB will donate 1$ to hungry children in Switzerland........NOT. But ols help nevertheless.

    A Post-Wh0re is a user who's only aim in life is to increase his post count. He/she gets off by receiving likes and mentions, and considers his post count a medal on his skinny chest. A post-Wh0re is the human equivalent of Chihuahua..bickering pointlessly, effortlessly, permanently.

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    Have you checked for air leaking and IACV proper functioning?

    I'm going through the same scenario these days. My first experience with EFI's and learning things

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    Check TPS and oxygen sensor as it is used to sense gases passing by and it can adjust accordingly. When it senses lean condition it will increase fuel and when rich it will decrease fuel. If the car is running properly means w/o slowing down then it could be MAF sensor vacuum leak can effect it.

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    Checked all of the above.

    There was an IACV error recorded once, but that was just once, and long time ago.
    A Post-Wh0re is a user who's only aim in life is to increase his post count. He/she gets off by receiving likes and mentions, and considers his post count a medal on his skinny chest. A post-Wh0re is the human equivalent of Chihuahua..bickering pointlessly, effortlessly, permanently.

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    As you say it was tuned but i believe was not done correctly. Main reason for this is IACV but few others can also contribute to it. Clean throttlebody and IACV then post results
    93 Accord CB7 (Sold) / 2005 CL7

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    All your mentioned symptoms point to the IACV, assuming that the tuning was done by a sane personality :p

    Iacv can can be bad and show no check light or whatever

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    Thanks guys!

    Will try changing the IACV tomorrow and report back if it doesn't work.

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    Quote Originally Posted by bango View Post
    Thanks guys!

    Will try changing the IACV tomorrow and report back if it doesn't work.
    lube it with light oil first.
    ZRS - Zulfiqar Racing Systems ..... - professionals at work - at crackwheels.com

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    Quote Originally Posted by bango View Post
    Thanks guys!

    Will try changing the IACV tomorrow and report back if it doesn't work.
    Pls report back in either case :p

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    OK reporting back. The problem of fluctuating RPM got fixed all by itself. Now the fluctuation isn't visible atleast to the naked eye.

    The odd RPM drop on first ignition resulting in shut down still pretains. Although it does start on the second ignition, it is merely annoying why it doesn't stablize RPM first time right away.

    Also, the acceleration isn't good - tbh I don't have a directreference point. The closest I can compare it with is my 6th gen VTi and this 7th gen feels a tad slower initially.
    A Post-Wh0re is a user who's only aim in life is to increase his post count. He/she gets off by receiving likes and mentions, and considers his post count a medal on his skinny chest. A post-Wh0re is the human equivalent of Chihuahua..bickering pointlessly, effortlessly, permanently.

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    Quote Originally Posted by bango View Post
    OK reporting back. The problem of fluctuating RPM got fixed all by itself. Now the fluctuation isn't visible atleast to the naked eye.

    The odd RPM drop on first ignition resulting in shut down still pretains. Although it does start on the second ignition, it is merely annoying why it doesn't stablize RPM first time right away.

    Also, the acceleration isn't good - tbh I don't have a directreference point. The closest I can compare it with is my 6th gen VTi and this 7th gen feels a tad slower initially.
    What about giving it a tune up
    93 Accord CB7 (Sold) / 2005 CL7

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