I have a 2003 Expedition with a 5.4. 163k miles. I bought it at 116k for $650 because the previous owner was tired paying the dealer to replace spark plugs and coil packs from water getting down in the plug wells. Anyway, to the present. My water suddenly disappeared on a recent trip and I got a #1 misfire code and it started missing a little bit. I opened it up and pulled the spark plug. It was wet. I put a scope down into the cylinder and there is 1-2 Tbsp of water in the cylinder with a bunch of gunk in it (see picture). I should have an exhaust gas tester for the anti-freeze next week but is there any chance it is failed intake manifold seals? I have checked the oil and there is no water in it. I had to drive it about 400 miles after the initial problem. It ran fine minus the occasional miss and the need to add water.
Am I holding onto false hope?
Stephen
Am I holding onto false hope?
Stephen
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