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Rough Idle question!

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    #1

    Rough Idle question!

    I know this topic has been covered a thousand and one times. Dont be mad I'm asking this. I got a 92 5sp The car has about 180k. It has a newer rebuilt h22a6 swapped in. Since Ive had the car Ive changed the Battery, alternater, plugs, wires, c/c delete, ac delete-complete. Cap, rotor, all fluids. Fuel/air filter. Adjusted the timing. I cannot get the rough idle to go away. Ive adjusted the air valve with the two screws on top of it, I forgot the name. And the Air valve with the screens in it, They were plugged up, It did help. Recently when it gets good and warmed up the idle will go from Almost dieing to about 12-1300 rpms back and forth.. Whats causing this new idle problem. Its always had a rough idle but it was steady, Now its jumping back and forth. When the car is off idle to 5,500rpms the car runs very good and strong, not a miss or sputter.
    Last edited by chronicponic; 09-27-2009, 10:26 PM.
    Tags: None
    #2
    There has to be a vacuum leak somewhere, that or your fast idle thermo valve is no good.
    Just my guess.

    There is a way to know if your FITV is no good. Remove the air filter tube connected to the plenum and expose the throttle opening. In there should be two holes, when the car is running and warm, there should be no suction coming from either hole. I'm not sure which hole is the one directly connected to the FITV... but you need to put your finger on them and if your idle becomes normal, then its you FITV.

    There should be a more detailed writeup about this somewhere on the web. I had nearly the same issue on my F22a1.
    Accord 93 LX: H23 intake mani, Ebay short ram, P12 ecu, Full exhaust. Lots of noise... and that's about it, just noise. LOL
    Mazdapeed MX-5 04: Begi Intake, Forge BOV, Ebay FMIC. Whoooooooosh... Phhhff!

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      #3
      ^^ my hatch did the exact thing,
      and it turned out to have a vaccum leak in the one of the lines.

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        #4
        K so my a/c hasn't been plugged in forever and i just went to hook it back up but now it squeals and my idle is jumping like crazy and if i rev it up it will bog down and sometimes die what could be some of the problems with that???
        Time to Fix it Up

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          #5
          Since ive had the car it sounds like a vac leak somewhere. I have been all over under the hood looking for a leak, But cant find one. After work i will try the holes by the throttlebody. Is there any spot where our cars are prone to getting a vac leak?

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            #6
            Originally posted by kkaiser7901 View Post
            K so my a/c hasn't been plugged in forever and i just went to hook it back up but now it squeals and my idle is jumping like crazy and if i rev it up it will bog down and sometimes die what could be some of the problems with that???
            Thread jack much? Lol.

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