Question about 2005 Hyundai Sonata

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Rpms swing at times as much as 1000 then it runs fine,very intermittent,has new timing ,plugs & wires, now they want to replace the wiring harness for the fuel injectors,car has 120,000 miles.Also at times car is slow to respond!!!

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Sounds like they have the timing wrong or there is a vacume leak

Posted on Sep 07, 2010

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