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    94 Aerostar with a 3.0L failed HC emissions test.

    94 Aerostar 3.0 failed HC emissions test I changed the wires, plugs, cap & rotor took it back to DMV to be tested and still failed. Also runs a little rough at idle. I checked the vacuum lines which all seem to be good. I took it to my mechanic who said there were no codes. Any help would be...
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