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Q: Water under coil covers and shorting out coils on 2004 Ford Thunderbird

The top of my engine is perfectly clean no water spots. I have a dealer telling me that my engine coils are under water they want $270.00 for new coil covers to prevent water from gaining access to the spark plug holes. Plus they also want to replace the coils. Why? How is the water getting in if there is no evidence of it around the coil covers or on the valve covers?
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Is the engine running rough or misfiring under damp conditions, this would be the case if the installation of the ignition system was braking down due to moisture. Is the cover anything you could simply replace yourself? Perhaps get a second opinion. Autozone have some popular workshop manuals for free on line once you register (for free) on their website
No it misses all the time under power. I'm looking for a cure this is the second time this has happened in one year, before that I don't know.
Be advised that although water can get into those spark plug holes and cause an issue with your coil insulation, that particular 3.9L V8 engine has a common concern of a valve cover gasket oil leak around the coil / plug holes, causing oil to get onto the coil boots, deteriorating them rapidly. Have this checked as well.
I changed the Spark plugs and there was no oil in the holes and no moisture in the holes until Ford got a hold of it then they say that 2, 4, 6 & 7 have moisture in them but it still missed when I got it back. The next time in they changed the coils and fixed the problem for about one year. Now I have it back again. Ford again claims water in the hole and wants to change the coil again, how does water get in without leaving evidence on the outside of the valve covers?
Another thing I didn't mention the first time:

There is a known issue with your coils. Internally, there is a breakdown in the coil and lack of adhesion between the epoxy and the coil housing material. These issues may cause the coil to operate at an insufficient voltage level, resulting in ignition coil misfires

Ford has an extended warranty program to replace faulty coils for 10 years / 100,000 miles from the original in service date. Hopefully they didn't charge you last time. If they did, you're entitled to a refund. This time, the coil should be covered again.

Make sure the dealership refers to program 07M07.

Hope this helps!
That never goes away. You have coverage continually. This particular program continues for the 10/100 period and does not get "used up" the first time around.
Oh boy, I get to do without the vehicle ever 6Mos for life while Ford collects against my insurance purchased from the selling dealer. If I were the insurance co. I would be crying foul! This is not only a planned outage its a planned expense! Not to mentioned lost time and expense getting the car to the dealer for repair or my time and cost to self repair!
Well, Carl... It's not quite like that; the insurance company doesn't figure in at all. It's a Ford covered expense. And it was certainly unplanned -- however, they are stepping up and extending the coverage to take care of potentially faulty coils. Ideally, you should eventually have all 8 changed, in total. I do not think you will change the same one twice.

I can understand the frustration; don't get me wrong. Just that under these circumstances, they are saving you hundreds of dollars. After all - the factory warranty is over, and they are helping.

The new coils they install, by the way, do not have the same flaw as the one replacement is necessary.
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