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Hesitation

(2004 Mercury Sable)
in Lecanto, FL on February 18, 2009
This car has 82,000 miles, been babied, and kept up on repairs as needed. When speed gets up to about 25-30, car hesitates. Took it to Advance Auto, they tested it, found cylinder misfire problems (times 3). Replaced plug wires, and plugs- still the same. Please help. This is my sons car- and he is frustrated.
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Popular Answer
on February 18, 2009
A low Compression on a Cylinder would indicate a misfire as well. Suggest have a qualified mechanic perform an Engine Compression test of your Engine. Failure of Electrical components such as a Camshaft and Crankshaft sensors would also indicate a misfire. Fuel Injector problem will also cause a misfire problem. Best to have a qualified mechanic perform a full Diagnostic of Fuel system. Ignition system. Computer control system and Compression test.
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