96 Mustang V-6 stick shift loud screeching noise when you start it then it comes and goes as you drive?
Usually that noise is caused by a slipping serpentine belt. When you first start, the alternator is creating a lot of extra electrical power to recharge the battery. During that time the alternator is more difficult to turn and if the belt is even slightly loose or the tensioner is marginal, it will make that terrible noise.
There are two probable causes. Assuming you are talking about a car fan, the screeching can come from a mis-alignment of the fan withing the cowl or shroud that conducts air to and from the fan. If you are talking about a home HVAC unit, the screeching probably comes from a slipping drive belt (or a tired hamster).
You drive a 1999 peugeot 206 engine 1.1 and when the car heats up and the fan comes on a loud screeching noise comes from the engine for a minute or so then goes away please help?
Example:Kernel sentence:The man investigated the noise.Then:The tall, dark-haired man investigated the screeching noise. The tall, dark-haired man fearlessly investigated the screeching noise. The tall, dark-haired man from next door fearlessly investigated the screeching noise. The tall, dark-haired man from next door, who moved in yesterday, fearlessly investigated the screeching noise which was coming from the car.
What could be a whirring screeching noise be in my fiat punto w reg it only comes on whilst driving over 35-40 mph?
A pig makes an 'oink' noise, or a grunting noise. However, when they are stressed they can make a horrible, VERY loud screeching sound. This includes when they are being vaccinated, weaned, or they know they're about to be fed. And believe me when I say that a shed full of screeching mature pigs is quite scary!