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inconsistent idle

Discussion in '2nd Gen. Tacomas (2005-2015)' started by JdubTaco06, Dec 13, 2011.

  1. Dec 13, 2011 at 5:17 PM
    #1
    JdubTaco06

    JdubTaco06 [OP] Member

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    Hey guys,
    Recently I noticed when I come to a stop and at idle it will stay at about 900 rpm then slowly drop to about 6-650 rpm for a few seconds and then it will jump back up to 900 and will continue this if I'm sitting at idle for a while. It seemed to start doing this after I did some maintenance (checked spark plugs, cleaned TB, cleaned MAF, cleaned K&N filter and thats about it. Truck runs perfect other than that. Any ideas what could be causing this? Thanks for any help.
     
  2. Dec 13, 2011 at 5:53 PM
    #2
    iroh

    iroh Well-Known Member

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    First thing I would look for would be a vacuum leak or a leak on a hose that connects between the MAF and the TB.
     
  3. Dec 13, 2011 at 8:02 PM
    #3
    JdubTaco06

    JdubTaco06 [OP] Member

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    No AC is not on and i'm not in defrost mode, but I'll double check the vacuum lines. It always idled at about 900 before and never moved at all, so could it be possible the MAF sensor got damaged when I cleaned it?
     
  4. Dec 14, 2011 at 8:15 PM
    #4
    400lbGorilla

    400lbGorilla ^Son of a hamster, I smell of elderberries.

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    Clean or change out your PCV Valve, that can affect your idle. You can spray some Carb cleaner through there to see if its blocked. A new one is like $6 from the dealer or Advance.
     
  5. Dec 15, 2011 at 8:55 AM
    #5
    JdubTaco06

    JdubTaco06 [OP] Member

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    Thanks, I will do that as well.
     
  6. Dec 15, 2011 at 8:56 AM
    #6
    acdronin

    acdronin Well-Known Member

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    Did you reset the ECU after you cleaned everything?
     
  7. Dec 16, 2011 at 7:18 AM
    #7
    JdubTaco06

    JdubTaco06 [OP] Member

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    Yeah I did that too. I always disconnect the battery when I work on it. I'll put a new PCV valve in this weekend and see if that helps. Also what was weird is that it took forever for the A/C to work again after I re-connected the batt. is that normal? Thanks for all the help!
     
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