Slight Hesitation - Fuel trims?

[MaxB]

My car sometimes has a slight hesitation at around 2-3k and I've been trying to work out what may be causing it. I haven't had a chance to log any data when it's done it yet but here's an example of the fuel trims and o2 sensor values when just idling. Can anyone notice anything out of the ordinary? The pre-cat o2 sensor switches between 0.8-9 and 0.1-2 every second or so leading me to believe the o2 sensor is fine. It's a 1.2. Any help or suggestions would be great

 

[JamesBryan]

The pre cat lambda switching is fine, that's what it's meant to do.

I'd look at coilpack or injectors.

 

[MaxB]

The pre cat lambda switching is fine, that's what it's meant to do.

I'd look at coilpack or injectors.

Yeah I thought so, it's a bit slow switching but I suppose they get slower with age.
It had a new coilpack and plugs about 8 months ago so probably worth me checking injectors. What's the best way to check them? It's a 1.2 so access to them isn't great as they're under the intake manifold

 

[JamesBryan]

Yeah I thought so, it's a bit slow switching but I suppose they get slower with age.
It had a new coilpack and plugs about 8 months ago so probably worth me checking injectors. What's the best way to check them? It's a 1.2 so access to them isn't great as they're under the intake manifold

Not really sure tbh on the 1.2

The slow switching could also be a possible low refresh rate of the Torque app/bluetooth dongle.

 

[MaxB]

Not really sure tbh on the 1.2

The slow switching could also be a possible low refresh rate of the Torque app/bluetooth dongle.

Ahh that's a good point, didn't really think of that.
Any idea of any good sensors to log which might give me any clues as to why it's doing it? Could it be a MAP sensor related thing?