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Test driving a 06 grand marquis,after about 30 miles it developed a soft knock low down in the engine. Any ideas

Just test drove vehicle

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Could be anything, but it is usually not a good sign. If you haven't bought it yet, skip it. It may be time to rebuild the engine.

Posted on Dec 08, 2014

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1992 grand marquis check engine light comes on when driving. Garage used diagnose machine but came up with no code. Don't know what to do. Sometimes the oil light will appear as well, then car stutters at...


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I have since put more oil in my car but a knock in the engine developed because I drove it while low on oil


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