Dismiss Notice



Register Today It's free! This box will disappear once registered!

Rev limiter ? 08 4.6 Ltd? Governor ???

Discussion in 'Stock 2006 -2010 Explorers' started by pjw73nh, December 19, 2013.

  • Searches ExplorerForum.com
    1. pjw73nh

      pjw73nh Active Member

      Joined:
      March 20, 2011
      Messages:
      237
      Likes Received:
      1
      Trophy Points:
      18
      Year, Model & Trim Level:
      08 LTD
      UP here in New England we're in the first REAL cold snap of the 2013 - 2014 winter season.

      This AM I left my car running for about 40 mins, with the heater on, and when I came out, car was not as warm as I would have liked. I attributed this to low idle and not enough coolant circulation...

      So when I got back in the car I revved the engine a bit to circulate some coolant. It stopped revving at 3500 exactly. Yet when I put it in gear and drove, I was able to punch it, get it to downshift, and get it up to 6000+ rpm.

      Does this engine have a governor? and/or does it only engage at low temps?

      Tnx.
       
    2. Support EF

      Join the Elite Explorers for $20

      Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself and learn which modifications work without having to experiment on your own. Elite Explorer members see practically no ads, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create more private Conversations, and more. Join Today. Your support is greatly appreciated.


      to hide adverts.
    3. Flag Gibby

      Flag Gibby Well-Known Member

      Joined:
      October 14, 2012
      Messages:
      1,641
      Likes Received:
      2
      Trophy Points:
      48
      City, State:
      Flagstaff, AZ
      Year, Model & Trim Level:
      2006 Mountaineer AWD
      No it is just the torque converter stall speed. As far as the cabin not warming up very well, it could be due to your thermostat opening too early and not letting the engine reach proper operating temperatures. It really should have been hot in the cabin if you had it idling for 40 minutes.

      Note: I overlooked the Park/Neutral statement regarding the OP... The correct answer is Yes there is a Park/Neutral rev. limit. It just happens that the stall speed and P/N rev limit are the same.
       
      Last edited: December 20, 2013
    4. Explorer0204

      Explorer0204 Active Member

      Joined:
      August 3, 2012
      Messages:
      413
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Upstate NY
      Year, Model & Trim Level:
      04 Explorer XLT
      In both neutral and park they have a rev limiter of 3500. Don't really know why but they do. My 02 didn't have it the 04 does. Even my friends 04 mustang does as well.
       
    5. Flag Gibby

      Flag Gibby Well-Known Member

      Joined:
      October 14, 2012
      Messages:
      1,641
      Likes Received:
      2
      Trophy Points:
      48
      City, State:
      Flagstaff, AZ
      Year, Model & Trim Level:
      2006 Mountaineer AWD
      Last edited: December 20, 2013
    6. mreed112

      mreed112 New Member

      Joined:
      November 18, 2005
      Messages:
      22
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Grosse Ile, MI
      Year, Model & Trim Level:
      2010 EB V8
      Torque converter stall speed has nothing to do with engine rev limiting in park and neutral. I believe that the reason for limiting engine rpm in neutral (and P) is to reduce impact loading to the transmission by preventing revving the engine to 6k and moving the shift lever from N to D.
       
    7. Flag Gibby

      Flag Gibby Well-Known Member

      Joined:
      October 14, 2012
      Messages:
      1,641
      Likes Received:
      2
      Trophy Points:
      48
      City, State:
      Flagstaff, AZ
      Year, Model & Trim Level:
      2006 Mountaineer AWD
      True, I overlooked that detail because it just happens that the torque converter stall speed on this generation is 3500 RPM; at least that is what I recall from the last time I checked it (or was it 2500??).

      So I was wrong, my original statement should have been Yes there is a Park/Neutral rev limiter because high RPM's on an engine not under load is hard on the internals; it also helps save the transmission as you mentioned mreed.

      I think that I am going to take a break for a couple of days from here... making too many stupid mistakes due to overlooking details. :mad:
       
      Last edited: December 20, 2013

    Share This Page







    We Support Our Troops!