low speed/low pedal torque spike

[Chubby Racer]

Occasionally while creeping forward in the school dropoff line or other, similar, low speed low pedal position driving I get this weird torque spike/surge. You can hear it in the exhaust and you can feel the car lurch forward. It's not cyclical, it will happen once and then go back to driving normal. I THINK I've captured it on this log, but honestly I'm not even sure what I'm looking for. And if I did capture it, how would I go about addressing it? Current tune attached too.

EDIT: vehicle is a 2015 SRT grand cherokee with longtubes and an FRP Tomahawk cam.




BMF_no_chop_v76_750_idle.hpt

torque spike.hpl

[LilSick]

are you certain that is the log you wanted to attach?

are you certain you do not want any help data logging?

good data is paramount

[Chubby Racer]

It's a clip from the correct log, but I'm not certain what parameter I'm expecting to see spike as it's not pedal request, so I figured torque was the thing to look at, and there's a random torque speak in that datalog.

[HaasExp]

Ain't going to get much info out of that log mate. Only a total 8 channels have data and 5/8 channels that logged are trans parameters.

[Chubby Racer]

Whoa. I guess I didn't export that correctly, then. Here's the whole log. I believe I'm seeing the spike at about the 32 second mark.

erin drive to work 12_10_24.hpl

[Chubby Racer]

Here's a log from this morning's school drop off. You can see the spike at about 1:17

erin drive to work 12_11_24 pt 1.hpl

[LilSick]

the only parameter that shows a spike there is 'engine load'

the timing or the throttle do not move

your rpm did not even increase

not at all

add 'engine speed sensor' to your chart vs time and speed your parameters up

[Chubby Racer]

the only parameter that shows a spike there is 'engine load'

the timing or the throttle do not move

your rpm did not even increase

not at all

add 'engine speed sensor' to your chart vs time and speed your parameters up

So you understand my confusion. The only thing I see spike is the actual torque here in blue.
actual torque.png