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Popping spark plug

i drive a 2000 Plymouth neon.it just started popping the no.2 spark plug right out of the cylinder.i was wondering if anyone out there

could tell me why.(after the first time i tried a new plug,and it only lasted about 50 miles before it blew out)thank you very much

Stripped spark plug holes are a fact of life. I would say that your #2 plug has had a bad thread repair. That, or the spark plug hole is stripped out and has not been repaired. You need to have a good mechanic check it out.