How to tell if low compression is bad piston rings
Low cylinder compression and blowby are often caused by stuck or worn piston rings, but diagnosing them at home requires sorting through symptoms like persistent misfires when other parts have already been replaced. Without funds for a professional mechanic, trying to pinpoint the mechanical failure yourself leaves you stuck guessing whether the rings are simply gunked up or require a full teardown.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
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How to tell if low compression is bad piston rings
- 1replacing parts like fuel injectors, coil packs, spark plugs, O2 sensors, and the alternatorDid this help you?
- 2performing a compression testDid this help you?
- 3trying to do repairs independently instead of hiring a mechanicDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“My fiance has a 2014 Honda Accord 2.4. It has an isolated misfire on cylinder 4. I have replaced fuel injectors, coil packs and spark plugs, Upper and lower 02 sensors, and alternator. It had a engine replacement and then went about 40,000 before limp mode. Im just looking for next steps to try and figure out whats next.”source ↗
“We dont have the money for a mechanic at the moment. Which is why over like 2 years ive been trying to do it myself”source ↗
Where this came up
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