My Ford Fiesta Zetec S 1.0 ecoboost is losing power whilst accelerating. No lights are appearing on the dash, we’ve checked a pipe from the intercooler and changed as was split (we thought it was sensing the heating up of the engine/turbo to be falsely overheating) that worked temporarily. The loss of power comes after accelerating to around 3k revs shortly after starting the car, almost like a limp mode. When I turn the car off for a few seconds and back on again, it will be fine until accelerating again. Nothing is showing on the diagnostic test & everything seems to be okay. Been serviced this week & that hasn’t changed anything either.

Have you checked all hoses for boost leaks  and high pitched hissing, 3 to 4 k is where the turbo is peaking when foot to floor, when my turbo hard pipe was loose I never got any codes just a noise and no power between 3 to 5 k 

a boost leak effects these cars quite badly, maybe a smoke test to confirm all is ok 👍 

Did you manage to sort? I’ve got the exact same issue at the minute. 
 

thanks 

On 4/5/2023 at 8:25 PM, Harry1210 said:

Did you manage to sort? I’ve got the exact same issue at the minute. 
 

thanks 

I too now have this issue with my 2015 car. Did anyone manage to resolve the issue??

No

Did you ever find a fix? my zetec s has just started doing it