I've had my Fiesta in to the local Ford agent to have it checked out for a noisy rattle in the engine when the car is stationary and idling... sounds more like a noisy diesel or like a hole in an exhaust... but they have drawn a blank and cant identify it as a problem at all. They have been able to hear the noise when they took the car for a test drive but then cant reproduce it in the workshop or find any fault in any components.

Has anyone heard this noise with any other Fiesta, or does someone have an idea what can cause it?

The ecoboost does sound like a diesel at idle...

Might just be normal.

Maybe just have to put up with it then... doesn't sound right to me

Ask to fire up a Fiesta or Focus demo 1L ecoboost and see how that sounds.

They should have one, most dealers do as they are so popular.

May just try that... the problem will be tho that it sounds perfectly normal idling when it starts up. Only after 10 minutes or so on the road and then the first stop at a red light does it start rattling. Originally I thought it was a noisy van or lorry next to me in traffic til I realised its coming from my car! Pretty sure it cant be normal.

If anything the ecoboost sounds worse first thing, and gets better as it warms up.

Have you taken the chief tech out for a test drive in your car?

There's murmurings of noisy Bosch high pressure fuel pumps.

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That's interesting ... I agreed to drive the car for a while longer and see if anything develops since the engineers couldn't identify a problem but I will need to take it back and have them investigate further. I wonder about the fuel pump?

Here's a Thread on it

http://www.fordownersclub.com/forums/topic/58474-noise-from-10-ecoboost-125bhp-engine/

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I'll try to get a recording ... don't think its related to the reports in that other thread as it sounds much noisier and more pronounced... I reckon Ford MUST be able to locate it and tell me what causes it

i have a 13 ford fiesta titanium 1.0 Ecoboost 125 and mines sounds like a rattly deseal when the engines cold! but soon as the engines heated up its goes more refined but you still gett a tickety rattly noise as mentioned above is the pressured fuel pump.............................sounds normal to me

There's also a common problem with the turbo heat shield rattling so worth looking at too. Mines still noisy after 24000 miles so I'm sure it's fine.

They all do it, it's the injectors, as its direct injection it uses a lot stronger spring in the injector, this tends to give the characteristic tapping at idle, like poorly adjusted tappets on the old cross flow engine.

Mines done it from new, no problems at all with it.