Strange noise!

[Carpysmith]

Hi everyone!

I am currently running a 2005 Focus 1.8tdci Ghia Hatchback. I have noticed that sometimes when it is parked up it makes a high pitched squeak/whine/howl type of noise! It is quite loud and last for about 5 to 10 seconds! Hope that makes sense but I couldn't think of another way to describe it! I usually only notice it in the middle of the night when it is quiet but yesterday it did it while I was emptying the boot! Has anybody on here noticed the same thing or can tell me what it could be?? Regards, carpysmith.

 

[jeebowhite]

is this with the engine on, or off? and how long after leaving the car alone does it do this?

[Carpysmith]

Hi there! It,s always with with the engine off, sometimes I don't notice it  for ages but the day before yesterday it did it within a minute or so of switching engine off! Very strange! I think it,s haunted lol! Mostly I only notice it at night when it,s quiet, sometimes it wakes me up if car is parked outside house!

[jeebowhite]

Could be the engine sensors checking after shutdown, it could also be the fan coming on for a burst?

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[Pullock]

About 5 minutes after mine turns off it makes a whirring sound for about 5 to 10 seconds and apparently it's just the engine performing checks and shutting things down correctly.

[Carpysmith]

Thanks Guys! Don,t think it,s anything like that because sometimes I notice it in middle of night when car has been turned off for hours! it,s deffo not a fan running, it,s more like a high pitched whine! Think I must be going nuts lol!!