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Rpm's drop from 3000 to 100 and then back up to 3000 when at 30mph

Discussion in '2nd Gen. Tacomas (2005-2015)' started by nbarker, Aug 13, 2012.

  1. Aug 13, 2012 at 3:53 PM
    #1
    nbarker

    nbarker [OP] New Member

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    i have a 2007 access cab, 6cyl, at. when at approx 30 mph the rpm's will drop from 3000 to 100 then immediately back up to 3000.
    toyota charged me $350 for a complete tune-up and this did not help. they checked the pressure of the fuel pump and it was good and the fuel filter was clean. i'm not sure what to do? i find this to be a security issue. can anyone suggest what to look for or do?
    thank you in advance
     
  2. Aug 13, 2012 at 3:55 PM
    #2
    KenLyns

    KenLyns Lord of War

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    What the hell amounts to a tune-up nowadays anyway?
     
  3. Aug 13, 2012 at 5:17 PM
    #3
    fixer5000

    fixer5000 the logical one

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    you can also try cleaning that sensor with brakeclean or contact cleaner just do not touch the element with anything but the solvents
     
  4. Aug 13, 2012 at 5:38 PM
    #4
    Jimmyh

    Jimmyh Well-Known Member

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    (IAC) Idle Air Control Valve possibly.
     
  5. Aug 15, 2012 at 3:10 PM
    #5
    nbarker

    nbarker [OP] New Member

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    Thanks going to pass that on to my neighbor friend who is having this problem with his 07 taco. I'll post an update when he gives me one.
     
  6. Aug 15, 2012 at 3:16 PM
    #6
    Nathan88

    Nathan88 Member

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    If you are going to spray the MAF use ONLY MAF cleaner, do not touch the spray nozzle on the sensor wires or you will have to buy a new MAF. I agree with JimmyH, you may need to clean the Idle air control valve. Sometimes they stick and will cause your engine to stall. I don't know what all was done in your tune up but you may also want to try cleaning the throttle body as well when your air filter was changed, it never hurts to clean the throttle body during a tune up =) hope this helps some.
     
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