Engine skips and stumbles at low rpm under a load

[Engine1s26]

2000 5.4, engine sometimes skips while driving, mostly when pulling off from a stop or when under a load like climbing hills. It usually always stop when the rpms get up. No trouble codes for misfires or anything like that

 

[Ulver]

You may have a misfire, yet the trouble code may be pending. Not sure how much testing capabilities you have as far as equipment, but check your ignition coils and fuel injectors first. Here's something that will start you off. COP Ignition Coil and Fuel Injector testing guides are in there.

https://troubleshootmyvehicle.com/ford/4.6L-5.4L/index-of-articles-1

On another note, IF you do get a misfire code, and want to see if it's the COP Ignition Coil causing the issue, you can swap it with whatever Ignition coil you want. And if that misfire moves to the cylinder you've switched it to, there's your answer.