Question about 1997 Mercury Cougar XR7

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97 v8 cougar check engine light is on autozone man said misfire on number 4 cylender doesnot missfire all the time what is the problem

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You don't mention the DTC, but I assume the fellow @ Auto Zone knew what he was talking about. If it is an intermittent misfire, I'd first look into plug wires. A broken wire can sometimes misfire....but it'll only get worse with the passage of time.

Might be a really good time to consider a tune up....plugs, wires, air filter, etc.

Posted on Jan 01, 2011

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Probably ignition coilon that cylinder going bad but check your ignition cable as well make sure its not broke or burnt through also how are your plugs? If that ignition coil is part of a coil pack and not an individual one you will need to replace the coil pack.If its an individual one then you need only replace that one.

Posted on Jan 01, 2011

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