99 f150 ticks after ya start it then starts humming

Ticking like that is normally the valve lifters. Make sure the oil is up to the correct level. Try adding a can of STP Oil treatment. It should quieten it. The ticking stops under load and as the revs rise. The valve lifter are hydraulically adjusted by the oil pressure.

It is a known issue

https://www.google.com/search?q=ford+f150+engine+ticking+noise

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The ticking noise could be a faulty hydrulic valve lifter. When last was the oil & filter changed, it coul be that the oil is thick and not going through to the lifters and when it warms up the oil is thin. It could be that the engine is need of an overhaul as 148.000 miles is 238.182 Kilometers and that is a hi milage.

Sometimes the IAC valve can cause a whistle sometimes resembling an airhorn. Does the truck have a rough idle? With it having an emission leak code i would assume that you probably have a hole in the rubber boot that goes to the PCV valve located in the passenger valve cover. There is a plastic tube that runs from the back side of intake behind the throttle body to the valve cover it will have a rubber elbow on each end of it. Look at the end behind the throttle body. It will probably resemble this.

Ticking sounds like a dry lifter, when was the last time you changed the oil and filter? Humming sounds like you need a tire rotation because of uneven tire wear.

Sounds like oil pressure problems to me. Check to make sure your oil level is correct. If the oil level is OK get the engine checked by a professional.

Sounds like a rotating electrical device not connected to the drive belt, like a rad fan. Not sure if this engine has a vacuum pump, but that could also be what's making the noise.

is it a knocking or a ticking? knocking is eather a wrist pin on a piston or crank bearing. ticking is cam lifter low oil pressure or no oil at all if you are in the 170,000 mile range then you are looking at a total rebuild this is around the time when parts start failing on ford engines metal shavings (take magnet and test to see if shaving stick to magnet these could be piston shavings its hard to tell with out seeing

If the ticking sound sounds like it is coming from the top of the engine them most likely one of the lifters is bleeding off while it is sitting. If the ticking goes away after a few minutes of operation then the lifter has pumped its self back up and is operating properly. There is not any damage you can do to the engine by not replacing the lifter at this point, just the annoying ticking sound when first starting. If at some point the ticking continues after running for a few minutes the lifter has malfunctioned and should be replaced. Just remember, if you replace one lifter you should replace all of them.

it just needs the tick over turned up a bit on first start up its still running on choke,,, fast tick over,,,
when the choke comes off it starts to stall on you,,, yes?
the tick over should be set at 750 - 850 rpm (in gear when hot) when makeing any ajustments to the tick over keep the hand brake and foot brake hard on,,,

solenoids are worn out, it will probably eventually start after 4 or 5 clicks but its annoying as hell