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Honda cold idle problem from hell... 91 accord

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  • Honda cold idle problem from hell... 91 accord

    Where to start with this one; well the car runs like complete dog shit on a cold start. Barely maintains any idle and will stall after any load for about a minute or two until the FITV kicks and and raises the idle. After that first initial warmup the car runs like a champ and has no stalling/idling issues. I swapped an H23 manifold onto the stock f22a1 and about a month or two after, and in the winter this shit started to happen.

    I have:
    1)Cleaned and replaced 3 different FITV's (even boiled one and adjusted it, apparently that didnt work at all )
    2) Replaced the IAC multiple times (junkyard pick, but tested to make sure proper operation before install)
    3) Changed ECT Sensor, IAT sensor, MAP Sensor broke out the trusty multimeter and checked resistances.
    4) No vacuum leaks to speak of, hoses are ran correctly.
    5) Deleted the Air Boost Valve (fixed a nasty driveability problem, but not start up.)
    6) In my desperation I even swapped in a random ECU I had laying around.

    Can anybody tell me what I'm missing or need to look at, I've turned wrenches for years but this thing is confusing the hell out of me.
    Last edited by Leftouch; 04-07-2012, 07:57 AM. Reason: derp grammar

  • #2
    whats the spark plug gaps like?

    have you tried putting the old manifold back on?

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    • #3
      Originally posted by Lukey View Post
      whats the spark plug gaps like?

      have you tried putting the old manifold back on?
      Forgot to add that, plugs gapped correctly. I would have swapped the old manifold on, but like a moron I threw it out.

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      • #4
        able to pick up another one for cheap?

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        • #5
          Could be iacv
          my eg build

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          • #6
            My brother did the H23 intake swap as well on his 92 Accord. Let me ask him how he fixed it and I'll get back to you.

            1989 Chevy Camaro RS | 1981 Mercedes 500SE AMG

            Originally posted by Skraight.
            And don't let the **** from the guy above get to you, he said he is saving up to buy a del sol lol.

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            • #7
              I'm starting to think it's a bad injector leaking down overnight. I have an A/F gauge and it remains pegged rich for about 2-3 minutes.

              Originally posted by RubbderDucky View Post
              My brother did the H23 intake swap as well on his 92 Accord. Let me ask him how he fixed it and I'll get back to you.
              I'd love to know what your bro found out, thanks man.

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              • #8
                Re: Honda cold idle problem from hell... 91 accord

                Make sure you connect ALL the ground wires back to the intake manifold. Also look for hoses you may have forgot to connect to the intake, look under the intake at the IAC hoses. Did any wiring get pinched between the head and the intake?
                lån uden sikkerhed

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