02 mercury cougar v6 #3 cyl code po303 cyl comes and goes.
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Hello and Welcome to Justanswer, My name is XXXXX XXX I am here to try and assist your with your question
need to replace the plugs or at least the plug in cylinder #3 and the plug wires.
it is common for the plug wires to go bad and carbon track the plug
did you get a chance to read the above?
how r u
basically nee to change the plugs and the plug wires.
so ur saying replace plugs and wires, and this dosen't work what's next?
check the coil pack for no spark
does it run rough all the time or just sometimes
just sometimes it idles fine
ok then it is most likly bad plugs and wires
plugs and wires will solve the concern
ok will install right away.
great please hit the green accept button thanks
25 years working as a service technician