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High idle

Discussion in '4 Cylinder' started by Draveling, Oct 4, 2012.

  1. Oct 4, 2012 at 8:05 PM
    #1
    Draveling

    Draveling [OP] New Member

    Joined:
    Oct 4, 2012
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    Dan
    Willow Alaska
    I just put a new head on my 2.7 Its starts and runs strong but its idling around 2000rpm It trys to drop back to normal idle sometimes which lead me to belive it was the TPS but I put a new one on and no change. I traced all the vacumme lines and everything looks good I even sprayed starting fluid all around while it was running to see if I got a change and nothing. Im not getting a check engine light.

    I was just wondering if anyone has any ideas. I dont want to have to put it on the dio.
     
  2. Oct 11, 2012 at 5:56 PM
    #2
    LDurchy

    LDurchy Well-Known Member

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    Cedar Falls, Iowa
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    2014
    Wonder if that new head was a milled head. Higher compression ratio might idle faster, also would 'run strong'.
     
  3. Oct 13, 2012 at 6:31 AM
    #3
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    Bill
    Navarre, FL
    Vehicle:
    1997 Tacoma 4X4 AKA "Blue Beast"
    Multi-point tow hooks, new bored 2.7L engine, custom paint. 3 inch adjustable Fabtech front coils, 2.5 inch rear AAL. Front Aussie locker. LED bed lights. Full LED conversion interior and exterior. Relentless Fabrication front and rear bumpers. 4X4innovation sliders. BAMF bed rack. CVT rooftop tent.
    The amount of higher compression from a simple milled head would not cause a higher idle. I have a milled head that I installed on my engine and I never had an idle issue.

    Check the basic mechanical parts first Dan. Did you accidentally adjust the throttle cable too tight? Is the cable or pedal binding/stuck? Look at the linkage for issues. Is the CEL on? Possible codes could be the culprit. Not all codes will turn on a CEL, so scan for codes just to be sure.

    OP, you mentioned that you have a 2.7 but more information would help. What year? Auto or manual? 2 or 4wd? The more information you provide the better off we can help.
     
  4. Oct 13, 2012 at 6:36 AM
    #4
    Steves104x4

    Steves104x4 Well-Known Member

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    Steve
    Buffalo NY
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    2010 RC 2.7 4x4
    BUCKLE UP! It makes it harder for Aliens to pull you out of your Truck.
    Sounds like a vacuum leak.
     
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