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Piston number 2 is misfiring

Hi. I have a problem.

My opel Astra G 1.6 16V has a problem, piston number 2 is not burning fuel/ gas. Whenever i test spark.. It's there, but the plug is covered in gas. What could be the problem. How do I fix it.

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Hi Chris,

How are you testing the spark? If the spark plug is working, it shouldn't be soaked in gas, obviously. If you're pulling the wire off the plug and verifying you've got spark at the end of the spark plug wire, that doesn't guarantee the spark is getting through the plug into the combustion chamber. Remove the spark plug from the cylinder and plug it into the plug wire then ground the threads against the block and crank the engine over. You should see spark between the electrode and the tip of the plug. If you don't see any spark, try swapping the plug with another cylinder and see if the misfire follows the plug. If that happens, you've got a spark plug that's damaged internally and not conducting the spark from the wire to the electrode.

If you do get spark and the misfire stays on cylinder 2, the next step would be to do a compression test. Without compression only a small amount of the fuel/air mixture is going to be present on the compression stroke and not much is going to happen when it sparks.

Try those things and let us know what happens; if you have a good plug and good compression we'll try and figure out what to do next.

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Chris Malaza 님은 대단히 고마워 할 것입니다.
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