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Hello, I am John, a Ford dealer technician.
I hope I can help solve your problem quickly and accurately.
The easiest way to bleed air out of the system is to take the cap off of the upper filter. Now turn on the key and wait for it to fill up to the top. Once full reinstall the cap and attempt to start. If it still won't start you got another problem.
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When you took the cap off was there any fuel in the filter housing or was it empty?
Do you hear the fuel pump turn on under the truck when the key is turned on?
Was the engine light on before no start?