1999 Mitsubishi 3000 GT knocking noise coming from the engine

1999 MITSUBISHI 3000GT
103,200 MILES • 6 CYL • 2WD • AUTOMATIC
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1999 Mitsubishi 3000 GT mileage: 103,200. I hear a knocking noise coming from the engine. I can hear it sometimes at idle but mostly when the engine is revved to 2000 to 3000 RPM. The sound seems to go away if I unplug the spark plug to the number 5 cylinder. Any suggestions on what it could be?
Nov 10, 2010 at 10:13 PM
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From the tests that you have described, it could indicate a possible broken piston or broken ring, or a failing wrist pin or rod bearing on the number 5 cylinder.
Nov 10, 2010 at 10:14 PM