Mechanics

ENGINE NOISE

2005 Honda Civic Hybrid • 4 cylinder 2WD Automatic • 100,000 miles

I have an engine noise on top of engine sounds like backfire/knocking noise I had engine codes p0300, p0301, p0302 when I disconnect coil pack number 2 the noise goes away
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Kimikim
July 6, 2014.




The trouble codes you have are all relating to an engine misfire. My concern is that the sound goes away when you remove power to the #2 coil. Have you removed the spark plug to inspect it?
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Yes I remove spark plugs I actually changed them all the ones in cylinder 1 and 2 had carbon deposits on them cylinder 3 and 4 were normal looking I don't know if you know this but theirs 2 spark plugs per cylinder

Tiny
Kimikim
Jul 6, 2014.
Hi again: yes, I'm familiar with the design. Listen, if you clear the trouble codes, do the same ones come back? Also, have you checked compression in the #2 cylinder? I question a burnt valve.

I have not done compression check, I'm not sure on the procedure for compression check on hybrid, someone told me I need a special machine. Do you know if this is true?

Tiny
Kimikim
Jul 6, 2014.
It's still an internal combustion engine. Here are directions.

http://www.2carpros.com/articles/how-to-test-engine-compression


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