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Auto Zone will check your codes for FREE... It will also tell you which one is bad.

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Q: How would you know if the sparks plugs are bad or if the coil is bad on a 1999 ford expedition?
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How do you replace the spark plugs on a 1999 ford expedition?

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How do you change spark plugs on a 1999 Expedition?

CHange the spark plugs from the bottom of the engine. Hope we've pointed you in the right direction.


What causes a 1998 Ford Expedition cylinder 4 misfire?

I had the same problem with a 1999 Expedition and it was a bad plug. Ford had a problem also with the plugs blowing out. It cost me about 1200.00


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What is code P1450 on Ford Expedition 1999?

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When is Jennifer sparks' birthday?

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Where are the spark plugs located in a 1999 expedition?

On the top of the head underneath the coil-pack. Remove the coil pack {1 screw}and you will see the plug in the tube. Not a fun job when you get to the back plugs, better plan on a whole day.