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Civic/CRX b18 swap idle problem

Discussion in 'General Tech and Maintenance' started by smokey, Feb 11, 2007.

  1. smokey

    smokey New Member

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    I have done a b18 swap on a 89 crx and every thing went rite accept a slight idle problem. My idle varies raising to 1750 rpm and then dropping to around 500 rpm.
    Also you can unplug the tps and there is no difference maybe you might have some suggestions let me know :wtf:
     
  2. ThatGuy4life

    ThatGuy4life The Riced Sleeper

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    clean your iacv, adjust tps
     
  3. ThatGuy4life

    ThatGuy4life The Riced Sleeper

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    The function of the IACV a.k.a. Idle Air Control Valve is to adjust the idle based upon the amount of air entering the engine, then the computer reacts to this information by adjusting the cars rpm.

    Reasons why you should take it apart and clean it:
    -High idle after your car warms up
    -Lumpy idle
    -Roaming idle
    -Hunting idle
    -Fluctuating idle

    Tools Needed:
    Ratchet
    12mm Socket
    Pliers
    Brake Cleaner or Simple Green
    Paper Towels
    A cooled down engine for at least 2 hours

    1) Now you got to locate where the IACV is, pop your hood and it’s located directly behind the intake manifold. It’s actually connected to it. Remove your intake and strut tower bar. (If applicable)

    [​IMG]

    [​IMG]

    2) Place a couple of rags underneath to catch the coolant spill. Loosen the two hoses running to the IACV with your pliers by squeezing the two clips and moving them away from the end. DO NOT cut the hoses as they are the exact length and you will have to buy new ones if you do.

    3) After doing that remove the harness connected to the IACV on the driver side.

    4) Then to finally remove it from the intake manifold, remove the two 12mm bolts.

    [​IMG]

    Now that the IACV is removed from the intake manifold make sure that you do not lose the rubber gasket as you need this so that it does not leak after you re-install the IACV.

    5) Take your brake cleaner or simple green and start to clean up the inside of the IACV by spray inside the two holes. Continue to do this until no more dirty fluid comes out. Should take anywhere from 5 minutes to 15 minutes. This depending on how old and dirty your IACV is.

    [​IMG]

    6) Once you’re done cleaning out the IACV let it air dry.
    Now your ready to re-install it back on the car so follow the steps backwards from 5 – 2

    for adjusting tps there should be a write up on here already just do a search, if you don't find it let me know
     
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