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Old 14 Nov 2011, 07:46 pm
bob bob is offline
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Default I have a 91 Honda Accord and the plug wires keep popping out of the spark plug holes. Whats wrong?

The car was fine until I changed the oil and took out each spark plug to inspect them ( I'm doing some pre-winter checkup ) . I put each spark plug back in and tightened them to the correct torque. Then now after the oil change etc, both middle plug wires popped out of their holes upon starting the car( which means those cylinders arent firing) . So I took the valve cover off and made sure the donuts were all sealing good..... I put the cover back on and only the middle left wire came out upon startup.... So I tool it off again and adjusted the valve cover and it still came out upon startup. So I switched the two middle plugs and this time the right middle popped out. So I thought it was the spark plug. Well then I put what I thought was the bad plug in the far right cylinder to make sure but the middle right popped out again, not the far right one that should have poppef up if the plug was bad. Each time the plug wire pops out, that cylinder isnt fireing so I gotta fix this.

Any ideas?? Somehow air is getting in the spark plug hole and popping out the plug wire???
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Old 14 Nov 2011, 08:16 pm
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buy better spark plug wires.
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Old 14 Nov 2011, 08:46 pm
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It would be unusual to lose compression through the plugs enough to pop the wires out. Is everything dry and free from grease, dirt and oil? It may just be that the plug wires have perished a bit and don't have the grip anymore to stay put.
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Old 14 Nov 2011, 09:01 pm
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Air is (blow-by gases are, actually) indeed getting into the spark plug holes. There is a little leakage past the spark plug tube seals but the fundamental problem is that there is pressure behind the seals in the crankcase. There is a breather hose that goes from the valve cover to the intake duct and that passage is blocked somewhere along the line. Remove the hose, make sure the hose and both fittings are clear, and the problem should go away.
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