Question about Mercury Cougar

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2000 MERCURY COUGAR , AUTOMATIC TRANSMISSION, 6 CYLINDER ENGINE. GOT A PROBLEM , IT FEELS LIKE IT HESITATES WHEN STARTING TO ROLL, LIKE WHEN IM AT A RED LIGHT, AND THE GREEN COMES ON,, THEN ON THE FREEWAY AT HIGH SPEED THE CAR STARTS LIKE SHAKING A LITTLE, LIKE IF THE FUEL FILTER WAS CLOGGED OR SOMETHING. CHECK THE OBD II SYSTEM AND GAVE ME CODE P0306, ANY IDEA ON WHAT IT IS AND HOW CAN IT BE FIXED???? THANK YOU.

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  • dklmn66 Mar 28, 2011

    great !!! thanxs for your help.

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Hi, the code that you are getting, p0306, indicates that you have an ignition miss on cylinder number six. This would likely be caused by either a bad spark plugs or ignition wires. From my experience working on these cars, it is best to replace both the wires and the spark plugs. I have done quite a few and I'm certain this will solve your problem. After 10 years of service, the ignition wires should really be replaced as just good maintenance anyway and the plugs are fairly cheap...just a little difficult to reach the back three. You'll need an assortment of extensions and a piece of hose to start the plugs down inside their holes. Once these items are replaced, you can reset the computer or just drive the car and it will eventually reset itself after the miss has been eliminated.

Just let me know if you need more info.
Dave

Posted on Mar 27, 2011

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