Engine noise when gas pedal engaged



My car suddenly has been making a loud reving/vibration noise when I step on the gas. It sounds like it is coming from the hood/engine area. It does not make this sound when the car is idling or when I am braking. Any thoughts on what this may be and if it is safe to be driving?


Since we can’t hear the noise it’s really tough to tell what it is. We also don’t know the year or mileage of your Protege5.

Have you opened the hood and looked to see if there is some obvious problem? Have you asked a mechanic to look at it?

I’m going to suggest something in the exhaust system is making noise. A loose heat shield, perhaps, or a crack the pipe itself, might cause noise under acceleration.

Unless we know what it is we can’t say whether it’s safe to drive. I think you should stop at your mechanic’s shop and let him or her check it out.


Not sure if the additional information will help, but it is a 2002 with about 102,000 miles on it. I haven’t asked a mechanic to look at it yet, it was just in the shop for other problems (i.e. new brake roters, horn replaced) so I want to delay going back, if at all possible. I haven’t looked under the hood yet… could I tell if it is a loose heat shield by doing so?


Actually, I think we had the heat shield removed recently.


You’d be amazed what you can solve just by opening he hood, putting your head under, revving the engine manually, and listening. Resonant vibrations like this are generally solved in exactly this way.


You know, heat shields do serve a purpose. It’s usually not wise to remove them.


My Blazer had a buzzing noise during acceleration after the intake manifold gasket was replaced. The noise turned out to be from the accelerator cable. It was not secured properly after the repair. I used a tie wrap to secure the cable and that took care of the noise.

Check under the hood for the noise, it might be something simple.

Ed B.


The noise does not occur when the car is in reverse, only when the gas pedal is pushed down (loudest) in drive or when in park. It sounds like a Harley… or a bad muffler, but the sound is clearly coming from the front of the car. I opened up the hood and couldn’t see anything-i think it is underneath somewhere.


Hi, I have exactly the same problem! Did you ever find out what was causing your car’s noise? Thank you


They might not even have the vehicle after 6 years and never returned to update. It is best to start your own thread with good descriptions of symptoms so the replies will apply to you.


Did you ever find out? I to am having this issue:(


Yes! There is a protective metal plate at the underside of the car that got a bit lose.
You need to get the car lifted at your favorite shop, so they screw the holding screws, or check why it got loose.

After they screwed mine, there was never any more noise!


Great thanks . I will have my husband check this out:)