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3rd IACV - Still erratic idle

Discussion in 'Civic and CRX - EF' started by caboose, Aug 26, 2008.

  1. caboose

    caboose USDM to the bone

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    Hello, My CRX HF with the D15B6 has a idle that bounces up and down between 1000 rpm and 1250 rpm. I have now tried Cleaning the original 3 times, replacing it with an Si one I had sitting around, and replaced that with one from a junkyard.

    When the TPS or IACV are unplugged it works fine. I am not getting any engine codes. If I plugged the crank case breather, I could get it to idle smoothly, but that only worked until I went to back it up, and it came right back. I have checked all of the vaccume lines coming off of the manifold.

    I really don't think that all of these IACV are bad, so I'm running out of ideas. Possible MAP?, would that even cause this? That's the only other thing that I can think of.
     
  2. caboose

    caboose USDM to the bone

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    Oh, if I unplug the MAP vac, it the car idles VERY low, if at all. If the MAP is unplugged, runs fine.
     
  3. t3t4delsol

    t3t4delsol New Member

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    reset your ecu, also check you pcv valve
     
  4. caboose

    caboose USDM to the bone

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    Well, after weeks and weeks of chasing my own tail, I FINALLY FIGURED IT OUT!!!!

    The PCV valve fell apart must have fallen apart when the previous owned it, so he unplugged the tps to get it to work. The and the only thing that was left was the spring, so essentially it kinda was a vacuum leak, it just was going through the pcv valve.

    I feel a lot better now, lol. 55mpg, here I come!
     
  5. caboose

    caboose USDM to the bone

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    lol, wish you would have posted a little while earlier
     
  6. awptickes

    awptickes unimpressed by you VIP

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    It's because you ground your crank.


    Lol, J/K.
     
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