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Vibration at idle

Discussion in '1st Gen. Tacomas (1995-2004)' started by Strato, Mar 6, 2010.

  1. Mar 6, 2010 at 7:43 PM
    #1
    Strato

    Strato [OP] Active Member

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    Well put the new cat on and fixed the rear main seal..now to tackle the vibration at idle...it runs good just vibrates a lot...Does anybody have any ideas why...no more CEL...after the new cat.. but dont really notice any improvement in power..
     
  2. Mar 6, 2010 at 7:45 PM
    #2
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    maybe do a quick seafoaming of the motor, and clean the tb......
     
  3. Mar 6, 2010 at 7:48 PM
    #3
    Strato

    Strato [OP] Active Member

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    Oh i forgot to mention i did clean the tb and the Maf...plugs look new...no vucuum leaks and the pcv valve shakes good..??
     
  4. Mar 6, 2010 at 7:50 PM
    #4
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    hmmmmm..........lemme think about this one for a few. how bad is the vibe...and does it go away when you put it into gear?? you can still sea`foam the whole intake/combustion chamber...usually, that cures a rough idle.
     
  5. Mar 6, 2010 at 7:52 PM
    #5
    Strato

    Strato [OP] Active Member

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    Its an auto tranny...its not as bad in park..and it hasnt stalled yet..but just vibrates a lot sitting at redlights...this is my first 4 banger truck ..do they vibrate more than a car?...thanks..i will seafoam it 2maro
     
  6. Mar 6, 2010 at 7:54 PM
    #6
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    sometimes, they can vibrate a lil more, or really, you'll notice it a little bit more.
     
  7. Mar 6, 2010 at 8:03 PM
    #7
    Strato

    Strato [OP] Active Member

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    So TC6..run the seafoam thru my pcv valve?..
     
  8. Mar 6, 2010 at 8:05 PM
    #8
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    you can run it thru there, but i'd run it slowly thru the brake booster, a lil easier to get that hose in the can, and it will clean everything. do it slowly tho, and use about a 3rd to half a can(pint).
     
  9. Mar 6, 2010 at 8:08 PM
    #9
    PacNWgen1

    PacNWgen1 NewHere

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    I just had the same problem with my 2.7. Went though did plugs, wires, cap, rotor, Cleaned MAF&IAC, Sea Foamed Intake, put some in the gas tank. And when I had the intake off to clean I noticed a huge crack in the exhaust manifold. It caused the A/F sensor to read lean and it dumps a bunch of fuel making it vib at idle and stumble off the line. It is a common problem on Gen 1. Might take a look. Hope this helps.
     
  10. Mar 7, 2010 at 7:57 PM
    #10
    metz2112

    metz2112 Member

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    I noticed the same problem in my truck - at idle it vibrates a ton.
    The exhaust manifold is cracked in half and has another large crack on it as well.

    Is there a good way to fix this? - JB weld burned right up and I can't find a junkyard that has any tacos at all.

    didn't mean to jump in on your thread, but I am confirming that a cracked exhaust manifold can cause a lot of vibration.
     
  11. Mar 8, 2010 at 5:44 AM
    #11
    Strato

    Strato [OP] Active Member

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    Im going to check mine later today...thanks for the heads up on that
     
  12. Mar 8, 2010 at 6:40 AM
    #12
    Taco GTR

    Taco GTR Valdosta State University

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    well that might be why mine idles roughl. but it needs a new cat on it. i think i might change my plugs and wires and things first. what is seafoam and how do you use it. i thought it was only for diesels.
     
  13. Nov 4, 2010 at 6:39 PM
    #13
    dustinclm

    dustinclm Well-Known Member

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    my 2.7L does this also, at red lights it has a pretty annoying vibration, if i shift out of D and back it will stop but when the motor settles again, the vibration will start again. its been doing this for the longest time and i just thought it was normal. I was told that the rubber exhaust hangers can start some harmonic motion whcih i believed because most of the time my exhaut tips would vibrate if they were loose until i got them re-located and secured better. but i also do hear a kind of sputter coming from the engine bay at certain speeds so i have been checking for a leak around the headers but have yet to find it??(i can hear it sputtering against curbs) could this be causing the vibrations even though the vibrations started a long while before i heard the leak??
     
  14. Nov 5, 2010 at 8:19 AM
    #14
    Chriskn1690

    Chriskn1690 Well-Known Member

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    I also have this problem, just bought a 2003 Tacoma 76K 2.7L Auto 4x4. When I'm stopped at a red light it vibrates like crazy, but when i put it in neutral it stops. Last weekend I did plugs, air filter, changed the oil over to 0W-30 Mobil 1 with a K&N oil filter, and Zmaxx into the oil and fuel. Truck idled a little smooter at lights, but still not cured completely.
    I heard from some people that the motor mounts are notorious for causing this problem, but I had mine checked out and those are fine. The exhaust manifold thing also makes sense, but I had the truck thoroughly inspected and it has no exhaust leaks at all.
    I think I'm just going to seafoam the thing tomorrow then live with it if it doesn't stop. After all, it is a 4 cylnder so it is going to have to work harder when it's in gear.
    If anyone comes up with anything else please let me know, I'll let you know how the seafoam works out.
     
  15. Nov 5, 2010 at 8:22 AM
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    steve o 77

    steve o 77 braaap

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    Its normal guys. Most small automatic vehicles will vibrate when stopped, especially in drive. My buddies old taco did it, my dads Hyundai Accent :anonymous: does it, and my buddies new 3rd gen 4 runner does it.
     
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