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Thumping sound coming from the engine

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Old 11-11-2010, 10:20 PM
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CA Thumping sound coming from the engine

Hey guys, I'm having this weird noise coming from the engine area when I take up to high RPMs it sounds like a thump as if I just hit a speed bump. Also, when I start the car the engine makes a high pitched noise not significantly above the normal engine sound but still noticeable, I don't know if both sounds are related and therefore are part of the same condition. There's about 85k miles on the car, so there might be a possibility of broken apex seals (though I doubt it) or maybe is just a defective spark plug. It also didn't seem to consume as much gas on the commute to and from work today, though I pretty much drove the same way. Weird.
Old 11-11-2010, 10:25 PM
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Can you elaborate on the noise a bit more for us without ESP. Like a single bump. A multiple bump. A rhythmic bump.
Old 11-11-2010, 10:28 PM
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When accelerating or on high RPMs is like thumps, it sounds as if I had a different engine. I only noticed from 6000 to 9000 RPM.
Old 11-11-2010, 10:33 PM
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Originally Posted by RioXavier
When accelerating or on high RPMs is like thumps, it sounds as if I had a different engine. I only noticed from 6000 to 9000 RPM.
Originally Posted by Easy_E1
Can you elaborate on the noise a bit more for us without ESP. Like a single bump. A multiple bump. A rhythmic bump.


uhhhhmmmmmm
Old 11-11-2010, 11:01 PM
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Maintenance history?
Model year?
Old 11-12-2010, 06:14 AM
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Found ur problem, based solely on your detailed description...
Old 11-13-2010, 03:31 AM
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It went away after a little bit of high RPM action, so I guess it was carbon buildup, or.... heck, I don't know, but it went away.

Last edited by RioXavier; 11-13-2010 at 03:49 AM.
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