TB and IAC (idle air control) valve cleaning - Page 3

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Cadillac Tech Tips - How to fix it Discussion, TB and IAC (idle air control) valve cleaning in Item Specific Cadillac Discussion; Ern, Most of us think you have CKP problems - but if you want to clean the IAC, in your ...
  1. #31
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    MD Eastern Shore - Kent Island

    Re: TB and IAC (idle air control) valve cleaning

    Ern, Most of us think you have CKP problems - but if you want to clean the IAC, in your car it's held by 2 Philips or Torx machine screws into the left (front) side of the TB. The screws are easy to drop - careful. Remove the IAC and clean the top hat plunger with a bit of TB spray but be careful not to let much/any run into the solenoid body itself. Also clean out the bore and passage in the TB with a fuzzy pipe cleaner - packs of them from craft stores. Rub a drop of engine oil on the O-ring and replace the IAC.

  2. #32
    BigErn23's Avatar
    BigErn23 is offline Cadillac Owners Member
    Automobile(s): 2000 Cadillac Seville STS, 2007 Cadillac Escalade
    Join Date
    Sep 2013

    Re: TB and IAC (idle air control) valve cleaning

    Thanks for the illustration.
    ....not sure about the butt plug, though.

    I figured I'll give it a shot. I understand its likely going to come down to the CKP, but I wont have time for that for a week or two.
    But thanks for all your time/help. I'll check the IAC tomorrow just to see if it makes any difference.
    If it is CKP for certain, think that would cause poor idle at standstill?

    Anyway.....if none of this works I'll just get a couple of them chrome fender louvers and be done with it.

  3. #33
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: TB and IAC (idle air control) valve cleaning

    My bad CKP sensor never caused an idle problem and I can't recall ever hearing of that. When they go bad they cause a longer than normal crank time and/or a stall at idle or sometimes a stumble or stall at cruise.

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