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5.4L Surging issue

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Old Jan 9, 2018 | 10:43 AM
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Default 5.4L Surging issue
My 2007 F150 5.4L is surging when cold. After very warm up, it goes away for the day. Very annoying until really warmed up. What's the cause?
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Old Jan 9, 2018 | 03:09 PM
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Thanks for joining

Tony
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Old Jan 9, 2018 | 03:40 PM
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Miles?
Maintenance History?
Any engine codes?
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Old Jan 9, 2018 | 03:44 PM
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Default 2007 5.4L surging problem
270,000 miles, perfect maintenance schedule, no codes thrown. After a good long warm up today on the highway, it runs as smooth as can be. No idle issues at all. Idles smooth as can be.
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Old Jan 9, 2018 | 03:46 PM
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I wonder if it could be a mild vacuum leak.
Does it make any odd noises?
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Old Jan 9, 2018 | 03:47 PM
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Clean the throttle body and Maf..check the foam gasket around the air box.
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Old Jan 9, 2018 | 04:30 PM
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Do these engines have idle air control valves?
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Old Jan 10, 2018 | 06:09 AM
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No..
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