My expo starts perfect all day long except when I start it first thing in morning. I have to have it jumped. Battery is good. No warning lights are on. What could be wrong? Spark plugs?

. Remove and fully charge the battery. Most auto parts stores will do this for free. Make sure they test each cell, too. The battery can't be good, if you have to have it jumped. It's likely breaking down under load, when it's cold outside. CCA are what's important, here.

. Clean the battery terminals and cable connections. Ensure connections are tight.

. Replace the spark plugs with the same Motorcraft plugs that came in the truck, if they have been in for more than 50,000 miles or 3 years.

. Test/replace the Engine Coolant Temperature (ECT) Sensor, if the problem persists.