Your IAC (Idle Air Control) valve is going bad. It is attached on your throttle body..
is the humming coming from the front end of the vehicle? i have a 1996 explorer with the same issue. yes the noise come from the front but not all the time seems to make the humming noise when it gets hot
Humming noise on the front passenger side of a 1997 Ford Explorer XLT may be due to a bad tire. Try to jack up the tire and spin it by hand to see if the noise is there.
If a car has a loud humming noise when accelerating, it could be that the air filter is missing. The air filter housing might also be loose. A loud humming noise can also be a signal that there is something wrong with the alternator belt or the fan belt.
Most likely the humming noise is coming from a contactor located in the outdoor unit if you hear the noise outside or from the air handler or furnance located inside the home,if the hum is inside the home
Your outside AC unit may be making a humming noise due to a faulty capacitor, a malfunctioning fan motor, or debris blocking the unit. It is important to have a professional HVAC technician inspect and repair the unit to prevent further damage.
the humming noise is coming from a bad ground on you stereo
Certain types of tires may cause a brief humming noise after your initial acceleration. The transmission may also cause a brief humming noise.
Your engine might make a humming noise near the alternator after you shut it down because the fan is still running or because the fuel pump is shutting down. Another cause for the humming noise could be the AC motor turning off.
Not an answer as such, but I'm wondering if it might do. We have a humming when the boiler isn't operating and when the Magnaclean unit is very hot to the touch.
It's the power steering pump. Check the fluid level. You might have to replace the pump.
fuel pump getting wore out
the engine the engine