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Searching for idle after bypassing heater core

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    #1

    Searching for idle after bypassing heater core

    91 Accord, F22A.

    I've bypassed my IACV 6 months ago after it went out with no issues at all. Just bypassed my heater core by running one hose to either side of the block,as I've heard multiple other people doing with no issues. Now idle jumps up to about 2k and falls back down to around 1k. I've bled the system, checked voltage on all connectors I could think of. I'm hoping it's something one of you experts will make me feel stupid about.
    Tags: None
    #2
    Check all of your vacuum hoses and connections. You might have knocked something loose while you were in the bay working.
    MR Thread
    GhostAccord 2.4L Blog

    by Chappy, on Flickr

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      #3
      How did you "bypass" your IACV? unless you have a chipped ecu with the IACV disabled, this isn't going to work well. If it had been idling OK for the last 6 months like this, I would call that luck. If your IACV is not functioning or you have the connector unplugged, or you have removed the coolant lines from it all are likely to give you issues. My advise would be to try getting the IACV system working as designed. Looping the heater hose isn't the cause of the idle issue. My usual check list for idle issue is: check coolant level, clean iacv, adjust and clean FITV, check for vacuum leaks. I have fixed bad idle on countless Hondas, and it's never been a bad IACV.

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        #4
        91LEVI, please do not delete your threads after your problems have been resolved. In fact, sharing your solution would likely help people with the same problem in the future.






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