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engine shake / vibration when cold

Discussion in '2nd Gen. Tacomas (2005-2015)' started by tammikm, Jul 10, 2009.

  1. Jul 10, 2009 at 3:53 AM
    #1
    tammikm

    tammikm [OP] Well-Known Member

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    Anyone elses truck shake when you first start it in the morning? It shakes / vibrates till its warm, then its not as bad.. rps stay the same, they are at 1500 rpm when i first start it and its cold this is when it is the worst.

    thanks
     
  2. Jul 10, 2009 at 8:01 AM
    #2
    nad

    nad mmmm tacos!

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    mine seems to idle really high when I start it but not really shake, i notice the shake a little bit of a shake once its warm and idling at about 600-700 rpm, Is yours vibrating fairly vigorously?
     
  3. Jul 10, 2009 at 9:10 AM
    #3
    brian

    brian Another Traitor

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    sounds like its just plainly missing and probably needs a tuneup.
     
  4. Jul 10, 2009 at 1:37 PM
    #4
    tammikm

    tammikm [OP] Well-Known Member

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    the shake is not real bad, but enough to notice it, if it was missing wouldnt i notice this while driving as well, it runs fine...
     
  5. Jul 10, 2009 at 1:39 PM
    #5
    nad

    nad mmmm tacos!

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    it could be some sort of sensor that determines how rich to run the truck when the automatic choke is on, most likely running to rich
     
  6. Jul 10, 2009 at 1:42 PM
    #6
    tammikm

    tammikm [OP] Well-Known Member

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    hmm, I thought maybe to lean, as I have been getting 27 MPG lately... over 600 kms to 63L fill up...
     
  7. Jul 10, 2009 at 1:46 PM
    #7
    nad

    nad mmmm tacos!

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    wow thats awesome 4 or 6 cyl? but usually if it is running really lean you rpm will probably be higher than 1600 when you start it and you might hear a pinging, running rich will make it bog down a bit and run rough
     
  8. Jul 10, 2009 at 1:49 PM
    #8
    tammikm

    tammikm [OP] Well-Known Member

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    strange, it stays at about 1500 rpm for a few mins, then down to about 600 rpm but you can feel a twitch or shake inside the cab, no fluctuation in rpm, its a 6 cyl 4x4.
     
  9. Jul 10, 2009 at 1:53 PM
    #9
    nad

    nad mmmm tacos!

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    27MPG IN A 6CYL!!!!! Ill trade ya! hopefully someone else has some advice for ya cause thats about all i know, and now everything i once knew is questionable, seeing how you can get mileage that I have never heard of!!!
     
  10. Jul 10, 2009 at 1:57 PM
    #10
    tammikm

    tammikm [OP] Well-Known Member

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    i have been getting that mileage for the last 3 months

    here are some of my fill ups, you do the math...

    583km fill up 61L
    480 km fill up 50.1L
    593 km fill up 62.8L
    etc etc... 26 - 27 mpg here in canada
     
  11. Jul 10, 2009 at 2:05 PM
    #11
    nad

    nad mmmm tacos!

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    nice where in canada do you live im from manitoba, I have a standard too, apparently they dont get as good of mileage as the autos believe it or not
     
  12. Jul 10, 2009 at 2:35 PM
    #12
    tammikm

    tammikm [OP] Well-Known Member

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    Ontario, I know I had a 6pd as well and traded it for an auto, my mileage was horrible 18 - 20 with it. the rpm's were so high at highway speeds I could not believe it, the auto runs much lower rpm's on the highway, I'd say 300- 500 lower depending on speed.
     
  13. Jul 10, 2009 at 3:42 PM
    #13
    NMG

    NMG Well-Known Member

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    Keep in mind that those all work out to roughly 22.5 MPG based on the US gallon. I almost got 22 on my last tank of highway driving and in mixed driving I'm getting between 20 and 21. I think you'll find that quite a few people can hit those numbers, especially after engine break in. It is nice to see better mileage though!

    Oh and to the original question, I haven't noticed any shake or anything like that upon startup. I know the 4.0 isn't exactly butter smooth, but I don't really notice it's character change between when the engine is cold or hot.
     
  14. Feb 3, 2010 at 8:48 AM
    #14
    peel.m

    peel.m Member

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    flowmaster exhaust, K&N cold air intake
    Truck - 2005 Taco - Double Cab, 4.0L, 4WD, Auto - 75K miles

    I just took mine in today for the engine shake on start up. Similarly, I don't notice it when driving but it seems to jerk on start up.

    They are looking at it today so hopefully something will be found.

    Has anyone had any resolve with this or any other possible causes?

    Thanks in advance!
     
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