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Surging idle corrected by hard acceleration/Check engine light?

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    Surging idle corrected by hard acceleration/Check engine light?

    So something odd happened the other day. My '90 LX has a surging idle whenever the clutch is depressed. A fairly common issue that I've yet to remedy as I barely ever drive the car. I understand the need to do a vacuum leak search, clean or replace the IACV, etc. I drove the car for the first time in a couple months the other day and decided to get on her pretty hard because (let's face it) it's fun even if they're not exactly rocket ships stock. So I wind her up to almost redline in first and shift to 2nd. I catch a check engine light so I back off and depress the clutch. No surging idle. In fact it's dead set at 1500 rpm, not even a hint of a waver. It's like this all the way home. Park, kill it and fire her up again. No Check engine light and the dreaded surging idle has returned. Anybody know what's happening here?

    #2
    First thing would be to pull the code (it should still be in the ECM memory). Surging idle many times is the Fast Idle Thermo Valve (FITV): http://www.cb7tuner.com/vbb/showthread.php?t=206012
    90 LX 4dr 5 spd 396,014 (sold 1/1/2022) - MRT: http://www.cb7tuner.com/vbb/showthread.php?t=201450
    08 Element LX FWD AT 229,000 - MRT: fleetw00d : 2008 Honda Element LX - CB7Tuner Forums

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      #3
      Thank you sir, If I take it to autozone will they be able to run the codes? Also, thanks for the link, I will check it out.

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        #4
        Just use the blue service connector that is located under the dashboard on the passenger's side.

        There are links on here about how to do this.

        Put a paperclip in the connector to "jump" it. Turn the key to the on position.
        Then you will see the Check Engine Light blink. A long blink indicates the first number of the code (10). The short, quick blink represents the second number of the code (1).

        Here is the Thread: http://www.cb7tuner.com/vbb/showthread.php?t=21259
        Keep Pushing..

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