tapping sound when barely hitting the gas and other questions!

Discussion in 'General Motoring' started by oddvark, Feb 26, 2007.

  1. oddvark

    oddvark Guest


    honda prelude 2001, rebuilt engine.

    When I just barely hit the gas, I get a sound like a rattle or tapping
    sound from somewhere in the engine area. If I remove my foot, the
    sound immediate stops the second my foot leaves the pedal. If I just
    barely touch the gas pedal, just enough to maintain speed, the sound
    occurs again. However, if I give it more gas, I cant hear the sound.
    Either because the rest of the engine gets louder or the sound stops.

    This sound starts occuring around 3000 rpm and gets louder the faster
    the rpms. The best way to discribe the sound is like tapping on your
    mouse with your fingernail about 5 times a second.

    What can it be?

    oddvark, Feb 26, 2007
  2. oddvark

    Graham W Guest

    The spash shield over the exhaust pipes at the front of the engine?
    Graham W, Feb 26, 2007
  3. oddvark

    Dano58 Guest

    If the sound is totally gone when you're foot is off the gas, then I'd
    think it may have to do with the engine shifting slightly when revved.
    Maybe the motor mounts aren't tight enough. I'd have someone rev the
    engine while you listen up front and see what you can see.

    Dan D
    '07 Ody EX
    Central NJ USA
    Dano58, Feb 26, 2007
  4. oddvark

    dold Guest

    (I'm not the OP, but interested.)
    Would that be tied to road speed or engine speed?
    I have a noise in a 2003 Civic, 70,000 miles. I can hear it outside the
    car as my wife drives away. I can hear it if I am driving, but just
    barely, unless the engine is cold, and under a load.

    I thought it was valve noise, so I had a valve adjustment done at 60,000
    with no change in the noise. I left the car over night, but they couldn't
    hear the noise the next morning. I should have gone in for the test drive,
    but I thought they'd hear it.

    If it's a shield, I should be able to affect it, or eliminate it by doing
    "something" to the shield.
    dold, Feb 26, 2007
  5. oddvark

    oddvark Guest

    Someone else mentioned the same thing.

    Are the motor mounts something that can be inspected while the engine
    is still in?
    oddvark, Feb 26, 2007
  6. oddvark

    oddvark Guest

    Is this the shield with the Hand picture on it that says do not touch?
    Can I safely remove these sheild temporarily to see if the sound goes

    oddvark, Feb 26, 2007
  7. oddvark

    Graham W Guest

    It may be. The bolts may be difficult to remove as they screw into very
    hot parts of the engine. Old ones seem to rot away around the bolts
    so the it leaves the shield loose and it rattles. A large washer may be
    fitted to apply to captivate it again. The washer may need its edges
    turning down to reach the shield.

    Graham W, Feb 27, 2007
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