Question about 2007 Ford Five Hundred Limited Sedan

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2007 ford 500 --have two problems the car accelerates and jerks when letting up on brakes -- took to dealer and ''reset transmission'' and having an issue with ac when car idles it stops cooling, when running air gets very cold, freon recently added tech said that the passenger side doesn't get as cold as the drivers side

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If the AC isnt cooling on idle then the fan isnt coming on ,so gas isnt cooling in the rad in front of the car ,now as for the pulling away bit i wiould disconnect the servo vacumn feed pipe and block the end of the pipe and try that in case the diaphragm is letting in air causing the idle to speed up

Posted on Jun 04, 2010

  • Colin Stickland
    Colin Stickland Jun 18, 2010

    sorry iam getting old and not writing what iam thinking ,comes with old age and i do think we all get it eventually ,what i should have written was try removing the vacumn feed pipe to the brake servo in case you have a air leak in the diaphragm ,but if it was that bad then your dealer mechanic should have picked it up unless he was more interested in playing around with his computer than diagnosing the fault.Now again as for the AC check that the fan is comiing on when AC is turned on .if so then have the compressor output checked with the correct machine ,also check the thin plastic pipes that feed the flaps in the heater unit because more often than not they have split rubber ends so they do not work


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AC problem sounds like compressor is starting to go. Same thing happened to me. AC tech told me that more RPM helps compressor cool but at idle speed it's weak. Replaced compressor on my 2005 and problem was solved. Hope your car is under warranty as it was expensive.

Posted on Jun 17, 2010


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