Hello,
I purchased my 2016 Focus ST (ST2) in August of 2016. The vehicle now has 11k miles after about 11 months of ownership. In the first 2k miles of owning the vehicle i began to notice a drastic acceleration issue that would occur once every few starts sometime more often and other times less its very off and on but has continued to happen even now. The acceleration issue occurs when the vehicle is started after sitting and cooling down for a while and after running it and then starting it again while its still warm.
The acceleration issue is odd and i have never heard of or experienced it in any other vehicle before.
Though the issue does not always occur, when it does it is immediately felt in the way the car accelerates. After starting the vehicle at slow speeds (0-15mph) the acceleration of the car feels normal. But once you hit half throttle in and gear under 5th the acceleration becomes sluggish and you can feel the car struggling to accelerate. The acceleration feels half as strong as when the vehicle is properly functioning. When the throttle is floored in 3rd the Focus ST will not rev past 4k on the tachometer. In 3rd gear with the throttle to the floor the car feels like full throttle in 6th gear with very little acceleration and the car struggling to accelerate. The weirdest part is that in 3rd gear at 3k rpms the boost gauge jumps right to full boast on the indicator on the dash but there is no boast felt in the car. Normally the car gradually starts to build boast at 3k rpms, but with the acceleration issue it instead jumps right to full boast with no feeling of boast building at all.
1st and 2nd gear don't struggle as much as 3rd gear when accelerating but both gear still don't rev even near to red line they peak 2-3k rpm below red line even at full throttle. There the same issue with boast in all gear as there is in 3rd the display reads full boast instantly at 3k rpms but no boast is occurring.
The issue will keep occuring as long as the vehicle is left on. But if the car is restarted the issue always goes away and the car is back to normal function and acceleration.
The acceleration issue concerns me because the car is not even a year old and it keeps occurring every few starts. I don't want to leave it unchecked and get out of warranty and find out the car is a lemon and there is a bad computer glitch or something. I have brought the vehicle to a dealer at around 8k miles and they could not find anything wrong with the car mechanically while they had it but the issue doesn't occur every time it starts.
I have come to the forums looking for advice and suggestions on what to do next. I am also curious if anyone else had similar issues with there vehicles which i have so far not seen on this forum. Any help would be greatly appreciated. Thank you for your time.
I purchased my 2016 Focus ST (ST2) in August of 2016. The vehicle now has 11k miles after about 11 months of ownership. In the first 2k miles of owning the vehicle i began to notice a drastic acceleration issue that would occur once every few starts sometime more often and other times less its very off and on but has continued to happen even now. The acceleration issue occurs when the vehicle is started after sitting and cooling down for a while and after running it and then starting it again while its still warm.
The acceleration issue is odd and i have never heard of or experienced it in any other vehicle before.
Though the issue does not always occur, when it does it is immediately felt in the way the car accelerates. After starting the vehicle at slow speeds (0-15mph) the acceleration of the car feels normal. But once you hit half throttle in and gear under 5th the acceleration becomes sluggish and you can feel the car struggling to accelerate. The acceleration feels half as strong as when the vehicle is properly functioning. When the throttle is floored in 3rd the Focus ST will not rev past 4k on the tachometer. In 3rd gear with the throttle to the floor the car feels like full throttle in 6th gear with very little acceleration and the car struggling to accelerate. The weirdest part is that in 3rd gear at 3k rpms the boost gauge jumps right to full boast on the indicator on the dash but there is no boast felt in the car. Normally the car gradually starts to build boast at 3k rpms, but with the acceleration issue it instead jumps right to full boast with no feeling of boast building at all.
1st and 2nd gear don't struggle as much as 3rd gear when accelerating but both gear still don't rev even near to red line they peak 2-3k rpm below red line even at full throttle. There the same issue with boast in all gear as there is in 3rd the display reads full boast instantly at 3k rpms but no boast is occurring.
The issue will keep occuring as long as the vehicle is left on. But if the car is restarted the issue always goes away and the car is back to normal function and acceleration.
The acceleration issue concerns me because the car is not even a year old and it keeps occurring every few starts. I don't want to leave it unchecked and get out of warranty and find out the car is a lemon and there is a bad computer glitch or something. I have brought the vehicle to a dealer at around 8k miles and they could not find anything wrong with the car mechanically while they had it but the issue doesn't occur every time it starts.
I have come to the forums looking for advice and suggestions on what to do next. I am also curious if anyone else had similar issues with there vehicles which i have so far not seen on this forum. Any help would be greatly appreciated. Thank you for your time.
