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Power Loss & Vibration

Discussion in '4 Cylinder' started by rtg34, May 13, 2010.

  1. May 13, 2010 at 2:31 PM
    #1
    rtg34

    rtg34 [OP] Member

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    Hello,

    I have a 2005 2wd 4cyl auto reg cab Tacoma with 65K on the engine. About 2 months ago I would periodically lose power @ 20mph-50mph with slight vibrations occuring in those speeds. Recently it has gotten worse with stronger vibration, and it happens between 20mph-65mph.

    I changed the air filter.
    Changed the plugs, and checked for spark. There is spark
    Cleaned the throttle body.
    checked all hoses.

    I noticed a slight vaccum coming from the exhaust. The exhaust needed to be forced out w/the gas pedal down, otherwise I could barely feel it.

    I'm thinking either:
    clogged catalytic converter
    egr valve

    Thanks in advance for any suggestions!
     
  2. May 13, 2010 at 10:10 PM
    #2
    neslerrah

    neslerrah Taco lovin'

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    Welcome to TW. Run some SeaFoam through your engine. Maybe that can help.
     
  3. May 13, 2010 at 10:12 PM
    #3
    ktmrider

    ktmrider Senior Member

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    Try this I think it will help you determine if the problem lies in the engine or in the cats
     
  4. May 20, 2010 at 3:00 PM
    #4
    DGXR

    DGXR Well-Known Member

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    Is it just me or does this sound wrong to everyone else too? I understand the exhaust to be a one-way pipeline from cyl port to tailpipe and there should be no way no how there is ever a vacuum in the exhaust. ??? /????
     
  5. May 21, 2010 at 8:47 AM
    #5
    rtg34

    rtg34 [OP] Member

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    The exhaust is not sucking back up into the engine. When i put my hand over the pipe I can barely feel it coming out. I put my hand over the pipes of 2 other vehicles and there was a big difference between them and the tacoma.
     
  6. Jun 15, 2010 at 10:03 AM
    #6
    skytower

    skytower Well-Known Member

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    Hitch and wiring, aux back-up light, rear strobe lights, radio and underseat sub.
    Loss of power is a symptom of a blocked or obstructed exhaust. Your engine can't breathe if it can't exhale.
    If you can, pull the pre-cat o2 sensor and check pressure.
     
  7. Jun 15, 2010 at 10:07 AM
    #7
    OCTaco

    OCTaco Well-Known Member

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