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darkinsignia 08-03-2009, 12:48 PM I have a 2005 Chevy Trailblazer LS I-6. Just today the check engine light lit up. I checked it out and the code is P0305 cylinder 5 misfire. It has fairly new sparkplugs (replaced in June) and a cylinder 3 and cylinder 5 have new coils. Anyone have any ideas? :confused: maxwedge 08-03-2009, 06:58 PM Could a bad coil, failed plug, bad or dirty injector, compression poor in that cylinder. Switch coils with a good cylinder see if the misfire moves. darkinsignia 08-11-2009, 02:03 AM Sorry, been busy lately. I switched coils and it still game me the P0305. Swapped spark plugs. Again got the code. So I asked a buddy of mine if he could do a a compression test. Turned out that cylinder 5 and 4 were below the 10% of the highest psi and cylinder 5 was below the minimum psi. Thanks. Its the head gasket. darkinsignia 08-11-2009, 02:04 AM :( man that sucks darkinsignia 08-11-2009, 02:07 AM Maybe this is why my 05 T-blazer has been stalling at red lights. awozniak 08-11-2009, 05:24 PM I have a 2005 Chevy Trailblazer LS I-6. Just today the check engine light lit up. I checked it out and the code is P0305 cylinder 5 misfire. It has fairly new sparkplugs (replaced in June) and a cylinder 3 and cylinder 5 have new coils. Anyone have any ideas? :confused: My 06 TB is sitting at the dealer as I write this with the head pulled off. The dealer is saying that the valve seat in cyl.#5 is allowing blowby and losing compression. The sad thing is that my warranty company is refusing my claim because there is no BROKEN part! I am noticing a pattern here is there anyway to get this on a recall list?? darkinsignia 08-13-2009, 01:54 AM My 06 TB is sitting at the dealer as I write this with the head pulled off. The dealer is saying that the valve seat in cyl.#5 is allowing blowby and losing compression. The sad thing is that my warranty company is refusing my claim because there is no BROKEN part! I am noticing a pattern here is there anyway to get this on a recall list?? I think I am noticing a pattern here too. darkinsignia 08-25-2009, 12:57 AM So, the dealership said that they were scared to take the cylinder head off due to the fact that the engine was an aluminum block and that they might break a bolt. So we just went ahead and put another engine in the T-blazer. Damn :banghead: Automotive Network, Inc., Copyright ©2013
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