anyone know this engine rattle? video included - 8th Generation Honda Civic Forum
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Old 06-09-2015, 03:16 PM   #1 (permalink)
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kjduncan18 just put it into 1st gear on 8thcivic
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anyone know this engine rattle? video included

I've got a mysterious rattle coming from under the hood that happens only when driving between 1200-2200 rpms. Its a little louder going up hills. Took it to a mechanic and got these codes: P0171, P0420, and the IMA code P0A7F.

Could be a broken cat? or a tensioner? Anyone had this sound before?
Mechanic looked at timing chain and its fine he also adjusted valve clearance. He didn't look at the cat converter because he claims the sound went away after he did the valve adjustment, but nope started making the sound driving away from the shop.

The sound is most heard at the end of this video:
https://www.youtube.com/watch?v=VN2a4WQJff0

Stats:
2006 HCH
174,000
Im the second owner

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Old 06-09-2015, 04:07 PM   #2 (permalink)
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Sergio Inzunza
crumbeliveable just put it into 1st gear on 8thcivic
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its extremely difficult to tell what the issue could be especially in the video. It gives the impression of a loose item.

This could be a possibility, but doubtful https://www.youtube.com/watch?v=BcRDEUjntbQ
(sounds similar)

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Old 02-24-2016, 09:29 PM   #3 (permalink)
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kjduncan18 just put it into 1st gear on 8thcivic
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I figured it out in case anyone has the same problem. It was a clogged ERG valve. Easy fix to do. I also highly recommend Cataclean for carbon build ups and P0420 code.
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Old 02-28-2016, 01:37 PM   #4 (permalink)
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out of topic I know but why is your IMA light on?
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