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Q: Truck has a miss only when warm on 2001 Ford F-150

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My truck just recently started missing but only when warmed up.Runs fine until it reaches operating temp. Check Engine light is not on and has never been on!Drove it to work one day and was fine in the morning. when i went to drive home at end of day it started to miss when the truck came up to temp.
Without the check engine light on, or codes stored in the engine module, this will require some hands on diagnosis. It may have diagnostic codes even though the light isn't on, so I would check that. Beyond that, you will want to connect a scan tool that can read live data and check to see where the fuel mixture readings are.
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