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RPM jumping a little in my manual '07 PreRunner

Discussion in 'Technical Chat' started by DLIT, May 28, 2008.

  1. May 28, 2008 at 10:45 AM
    #1
    DLIT

    DLIT [OP] New Member

    Joined:
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    07 TRD PreRunner SR5
    Hey, everybody. New here. Something is bothering me about my '07 PreRunner.

    It's a manual transmission and when I'm coming to a stop, I press the clutch in, put it in neutral and coast to the stop. The thing that's bothering me is that around 15-20mph when my engine should be pretty much idle because it's in neutral the RPM will jump up to past 1k and eventually go back to idle just as I'm completely stopped. Why the jump in RPM as I'm slowing? TIA.
     
  2. May 29, 2008 at 10:49 AM
    #2
    DLIT

    DLIT [OP] New Member

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    No suggestions, huh?
     
  3. May 29, 2008 at 12:52 PM
    #3
    nagelg

    nagelg Well-Known Member

    Joined:
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    Northern Wisconsin
    Vehicle:
    '08 Black, acc. cab, 4x4, 2.7
    gremlins?
     
  4. May 29, 2008 at 1:17 PM
    #4
    DLIT

    DLIT [OP] New Member

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    Hilarious.
     
  5. Jun 9, 2008 at 8:06 AM
    #5
    muclhed

    muclhed Member

    Joined:
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    Member:
    #4441
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    Vehicle:
    2007 TRD Sport 4X4 Black Quad Cab 6-Speed Manual
    K&N 63 Series Cold Air Intake, Flow Master Dual Outlet Super 44 Mufler w/Dual Factory Chrome Exhuast Tips, 20x8.5 American Racing Chrome Razor 6 wheels w/ 265/50/20 Toyo Proxy ST tires. Putco Hybrid Chromed Alumininum 5" Oval Step Bars
    What your describing sounds normal to me. as you are slowing, the air flow to the radiator is decreasing and the engine is still warm from running at a higher rpm(higher than idle) running down the road. In that case if the engine is still warm and not getting the air flow it needs to control the temp so the computer in gauges the clutch fan and adjusts the rpm up to compensate for driving the extra drag from the fan

    If you notice letting the truck idle for any amount of time this will happen on and off quite frequently as the truck tries to keep its operating temp in check

    This may have just become more noticeable with the summer heat


    Just my input, hope that helps
     
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