Are you sure your valve cover gasket isn't bad? Maybe when you removed the plugs the oil ran into the cylinders. If there was that much oil like you're saying you would be blowing blue smoke out of the exhaust.
I would do a compression test and pull the valve cover to inspect the valve cover gasket.
I do believe there is a TSB on the cold start issue. I think the fix was an update to the stock tune on the ECU.
FR '11 FF Mod pick
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