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99 expedition coolant in #4 spark plug well


expjoe
04-12-2009, 07:09 AM
i have a 99 expedition with 120k miles on it, I changed the plugs and wires at 110k. recently it started running rough and my CEL came on. I had the code checked it was the #4 plug misfiring, I pulled it and found the plug well was filled with coolant, could the intake manifold gasket need replacing? Or is it a cracked head? Anyone have this problem would love to hear from them.

way2old
04-12-2009, 08:28 AM
Look at the heater hose above the cylinder. These have been known to leak and coolant run into the plug well.

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