Hi guys n girls, we have a 2013 1.0 fiesta ecoboost with 83k it is the 125hp version (titanium) it has a severe lack of power and also hesitation sometimes when accelerating.
The lack of power is so bad it will not pull over about 70mph and it takes ages to get there, almost as if the turbo is not working, Now here is where it gets interesting! bear with me!
I have read so many posts of various forums with people that had similar issues, here is what we have done and discovered so far but still have the lack of power and hesitation-
Replaced spark plugs and coil packs, found one spark plug insulator was severely cracked and initially thought that was our problem but sadly after new plus and coil packs still the same although we did get rid of the misfire.
Also changed rocker gasket as that was leaking and filling up the spark plug area with oil, it certainly looks like someone has been in there before us!
Replaced the tiny silicone/rubber diaphragm in the take off on the vacuum pump as they are prone to falling apart which ours was, sadly still no power and hesitation.
I have tested the cam driven vacuum pump with a hand held vacuum tester and that all seems fine as does the actuator and blow off valve.
Inspected the high pressure fuel pump and bucket and cam lobe, all seem fine with no wear.
we have no engine codes when this started (well actually we brought it like this so its always had the problem)
However we now have fault code P0420 catalyst system efficiency below threshold bank 1
So is it possible the cat is at fault and has been all along but only now threw up a code?
Would a bad cat or faulty 02 sensor cause sever loss of power plus hesitation?
Im guess its possible the original cracked insulator on the old spark plugs caused over fueling which may have contributed to the possible cat failed?
Anything else i can test?
Oh checked the live readings of the 02 sensor on bank one and i took a video which i have attached a link to here-
From what i read the 02 sensor voltage on sensor 2 should be stable ish around 0.6v but ours dropped down to 0.1 a few times while recording, however after holding the revs at 3k for a few moments it eventually became stable at 0.6v
Let me know your thoughts and if there is anything else i can do the test etc.. before spending money lol
The lack of power is so bad it will not pull over about 70mph and it takes ages to get there, almost as if the turbo is not working, Now here is where it gets interesting! bear with me!
I have read so many posts of various forums with people that had similar issues, here is what we have done and discovered so far but still have the lack of power and hesitation-
Replaced spark plugs and coil packs, found one spark plug insulator was severely cracked and initially thought that was our problem but sadly after new plus and coil packs still the same although we did get rid of the misfire.
Also changed rocker gasket as that was leaking and filling up the spark plug area with oil, it certainly looks like someone has been in there before us!
Replaced the tiny silicone/rubber diaphragm in the take off on the vacuum pump as they are prone to falling apart which ours was, sadly still no power and hesitation.
I have tested the cam driven vacuum pump with a hand held vacuum tester and that all seems fine as does the actuator and blow off valve.
Inspected the high pressure fuel pump and bucket and cam lobe, all seem fine with no wear.
we have no engine codes when this started (well actually we brought it like this so its always had the problem)
However we now have fault code P0420 catalyst system efficiency below threshold bank 1
So is it possible the cat is at fault and has been all along but only now threw up a code?
Would a bad cat or faulty 02 sensor cause sever loss of power plus hesitation?
Im guess its possible the original cracked insulator on the old spark plugs caused over fueling which may have contributed to the possible cat failed?
Anything else i can test?
Oh checked the live readings of the 02 sensor on bank one and i took a video which i have attached a link to here-
Let me know your thoughts and if there is anything else i can do the test etc.. before spending money lol