What is your question?
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What is your question?
It's a vibration/jerky feeling. When I accelerate DOWN the on ramp onto the interstate there is no misfire or rarely a mifire. If I go on an uphill ramp onto the interstate my truck misfires as I accelerate. And a lot more when it is over 90 degrees outside. The truck also doesn't misfire when speeding up on the highway if I'm on a downhill slope. If I'm accelerating uphill, once again I have a misfire. I'll add, I've swapped the ignition coils and it's Ford's 5.4 liter V8. No engine light at all.
What makes this problem better or worse?
Cold weather is better.
How long has your 2009 Ford F-150 had this problem?
2 months
Misfire upon acceleration is a classic symptom of cop (coil on plug) failing!