Video : PXL_20231212_000604976.mp4
This is a 2014 Ford f150 3.5L Ecoboost

When accelerating in motion, I hear this spitting or hissing sound I suspect from the left side(driver) of the engine. When hitting the gas pedal to accelerate

The truck doesn't lost power or stutter until I floor it and stutters a little until it catches up to speed then no more sounds

I was able to get the sound on the video here.

Any ideas what is this?

No engine codes or check engine light.

Besides the noise and stuttering when flooring the pedal, no device issues, no engine shaking and nothing else.

I suspect the high pressure pump or the fuel injectors but wouldn't those throw a check engine light?

 

Scan for pending codes. Even if there isn't one, my first thought is the electronic blow off valve. The diaphram is known to tear (it usually pops something like P0299 for "underboost condition").
Pretty easy to check as well:

Just watched the video again. It sounds like you may have a significant boost leak somewhere. The pulsing is odd, kinda like one turbo is fighting the other, so maybe a wastegate issue? With the engine running, poke around the engine bay feeling for leaks at all boost tube connections.

 

I did replace the valve in the videio about 1k Miles ago. i checked for codes and there are no codes. I am trying to check for leaks also i think it is likely