Hi,

I have a 2011 mk7 fiesta zetec s that has recently been losing power. When accelerating I've noticed a rattling noise coming from the engine it then suddenly loses some power and the rattling stops. For instance I will be accelerating in 3rd @ around 3k rpm and watching a steady climb then suddenly you feel the call get slowed down and the acceleration drastically drops.

My mechanic has had the spark plugs changed and lines cleaned out but to no avail. No errors when plugged in either. Really annoying when overtaking.

As well as this the power loss affects the gears, suddenly it begins to bog down and stall in gears that it is usually fine with. For instance juddering in 4th @ 30mph which it is usually ok with.

Anyone else had problem or similar and found a solution?

 

Thanks.

On 9/11/2018 at 9:37 AM, Lukebyers16 said:

Hi,

I have a 2011 mk7 fiesta zetec s that has recently been losing power. When accelerating I've noticed a rattling noise coming from the engine it then suddenly loses some power and the rattling stops. For instance I will be accelerating in 3rd @ around 3k rpm and watching a steady climb then suddenly you feel the call get slowed down and the acceleration drastically drops.

My mechanic has had the spark plugs changed and lines cleaned out but to no avail. No errors when plugged in either. Really annoying when overtaking.

As well as this the power loss affects the gears, suddenly it begins to bog down and stall in gears that it is usually fine with. For instance juddering in 4th @ 30mph which it is usually ok with.

Anyone else had problem or similar and found a solution?

 

Thanks.

Which specific engine is it?