adjust the valves- the clearance between the rocker arm and the valve should be checked with a feeler gauge.
stop using cheap or the wrong grade of gas. use fuel injector cleaner and octane booster and that should do it.
The lifters are failing and need replaced to stop the noise.
yes horn is not working
clock spring
clock spring
Your toilet may be making noise every few minutes due to a faulty flapper valve, a leak in the fill valve, or a problem with the water level in the tank. These issues can cause the toilet to constantly refill and make noise. It is recommended to check and repair these parts to stop the noise.
Check your EGR valve
Sounds like the porselin Valve!!!!
May be the Idle Air Control Valve sticking or dirty.
To reduce lifter noise in a 2001 Ford F-150, first ensure that the engine oil is at the correct level and is clean, as dirty or low oil can cause lifter noise. Consider using a higher viscosity oil if the noise persists, as it can help maintain better lubrication. Additionally, inspect and replace any worn or damaged lifters or rocker arms, and check for proper valve adjustment. If the issue continues, it may be advisable to consult a mechanic for further diagnosis.
PCV valve.
stop noise become wise