Question about 2004 Ford Freestar

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Have spark knock when press gas hard

New plugs and wires

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Timing is off. Or you may have engine cooling problems that is causing preignition. Does this happen when you are climbing a hill, is the car hot or cold? Did you route the ignition wires the same way as the old ones. you can be getting crossfire . Need more information

Posted on Dec 03, 2014

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sounds like spark plugs or the spark plug wires.. I had the same problem...

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