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I started having a problem recently with engine noise while the accelerator is being depressed.

The engine noise is normal when the car is idling, stopped or coasting. When I press the gas pedal, I get a louder noise. It almost sounds like there is something wrong with the muffler. I'm not entirely convinced, though, because I can't tell if it's a knocking noise or a muffler noise.

This started happening immediately after I stopped in for an oil change. In addition to having my oil changed, I also had the mechanics top off my fluids and replace the engine's air filter.

Car information:
2006 LS Sedan
59k miles

I plan to have someone else press the accelerator with the car in neutral, so I can stand outside and listen to the noise. Will post results.

Thanks in advance!
 

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idk how car- savvy u are but if i just got my oil changed and now my engine was making a noise i would take it right back before something bad happens and ur screwed
 
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