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Knocking/rattling noise when pressing gas pedal


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weezy
New User

May 5, 2012, 12:12 PM

Post #1 of 4 (3373 views)
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Knocking/rattling noise when pressing gas pedal Sign In

We're talking about my:
Mercury Grand Marquis - 1998
4.6L engine
105,000 miles

Whenever I hit the gas I hear this rattling/knocking noise coming from the right side of the engine (from the driver's perspective). It doesn't make this noise if I am parked, only when the car is moving. Here's a link to some audio of the sound with pics of the car/engine.
http://youtu.be/Ws69du3k3VU

Any ideas what might be wrong?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

May 5, 2012, 3:41 PM

Post #2 of 4 (3318 views)
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Re: Knocking/rattling noise when pressing gas pedal [In reply to] Sign In

Get codes even if no CEL on there's something in there of some use..............

T
_________________________________________
Long retired now


weezy
New User

May 5, 2012, 3:50 PM

Post #3 of 4 (3310 views)
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Re: Knocking/rattling noise when pressing gas pedal [In reply to] Sign In

I'm sorry but I don't understand your answer. Specifically, I don't understand what you mean by "get codes" and I also am not sure what you are implying by "there's something in there of some use". Could you please clarify. And you're right, there is no check engine light on.


Discretesignals
Veteran / Moderator
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May 5, 2012, 3:51 PM

Post #4 of 4 (3309 views)
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Re: Knocking/rattling noise when pressing gas pedal [In reply to] Sign In

The rattling noise sounds like an exhaust leak in the audio.





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Knocking/rattling noise when pressing gas pedal


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