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hissing noise when hitting gas?

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    hissing noise when hitting gas?

    Lately ever since I put the new ecu and tcm for my car because of my h23 swap eveytime I give it some gas there is a hissing noise and its driving me crazy.anybody have any ideas what could be the cause of the problem?
    Project EP hatch on the way

    #2
    Sounds like could be an exhaust leak a small one at that.

    The New-ish Ride
    My old Ride
    Hear my Vtak!!!
    MK3 Member #3
    I piss off people for fun.
    IA 08 Sunburn Victim #1

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      #3
      vaccum leak perhaps??
      "This truck is 100% sh*ts and giggles."
      "Speed has never killed anyone. Suddenly becoming stationary... that's what gets you." Jeremy Clarkson

      You're not JDM until you have a car built in ohio with tons of bolt ons from ebay.
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      BUS 62 AIN'T F'ING AROUND!

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        #4
        The same here,,,, It turned out to be the gasket to my intake mani......



        93 Accord H22.. 10th anniv.edition-wrecked R.i.P

        99 EM1 Boosted type R- Jacked and never found

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          #5
          Hopefully I'm gonna find out if its an exhaust leak I'm gonna find out soon because I just put a 2.25 in muffler and I'm gonna do the 2.25in piping from the cat back.stock piping sucks.I really appreciate the input from u guys thanx!
          Project EP hatch on the way

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