hey guys my vehicle fuel trims have started going wild only at idle
They read anywhere from plus 15 to 30.. idle is pretty rough.. vehicle is shaky sometimes at slow speeds
Slight power loss however.. wide open throttle feels normal
Strangely this is ltft only.. the stft look OK
The trims return to normal when driving.. letting off the throttle returns a very lean ltft again
Ignore the o2 reading in the photo
This shows a normal reading at idle.. it was slow to react in this photo
Maf shows as 2 grams per second
Slight smell of fuel through the vents with heaters are and under the
Vacuum test on intake and exhaust returned nothing
Swapped out the maf.. no difference
New evap.. no difference
Exhaust manifold has no leaks
Strangely pulling out the maf wiring drops the fuel trims to about plus 12.. however this is still not normal and still runs rough
Every so often get a p2187 eml which is to be expected idle long term fuel trims
Any ideas? O2 sensor? Any ideas would be appreciated Vehicle is a fiesta st mk7 2016 Appreciated
They read anywhere from plus 15 to 30.. idle is pretty rough.. vehicle is shaky sometimes at slow speeds
Slight power loss however.. wide open throttle feels normal
Strangely this is ltft only.. the stft look OK
The trims return to normal when driving.. letting off the throttle returns a very lean ltft again
Ignore the o2 reading in the photo
This shows a normal reading at idle.. it was slow to react in this photo
Maf shows as 2 grams per second
Slight smell of fuel through the vents with heaters are and under the
Vacuum test on intake and exhaust returned nothing
Swapped out the maf.. no difference
New evap.. no difference
Exhaust manifold has no leaks
Strangely pulling out the maf wiring drops the fuel trims to about plus 12.. however this is still not normal and still runs rough
Every so often get a p2187 eml which is to be expected idle long term fuel trims
Any ideas? O2 sensor? Any ideas would be appreciated Vehicle is a fiesta st mk7 2016 Appreciated
