Hondata

I have only been able to replicate this on the long straightway at my local track. I wasn't able to do it on the street (but I can try again). Luckily I have datalog from the track.

So I am WOT on the straight until I am in 4th gear at ~7k rpm, I then ease off throttle to maintain a speed before a high speed turn.
When I ease off throttle, the car starts to violently jerk.

I am trying to figure out if it is a problem with the tune or it is a TPS problem. This is a fairly newly built k24 frank motor so I'm not sure if the tune is fully dialed in. I have an Acuity TPS

I have calibrated the TPS on the Kpro.

Is it:
1. the car jerking, causing my foot to shake and causes the fluctuation in TPS?
2. the TPS is bad and is causing the jerking specifically around 20-40%?
3. the vibrations of a k24 with type s oil pump is causing too much vibration and messing with the sensors?

Could someone take a look at my data log and guess what is causing the jerking? The times to look at is 2:18, 4:08, 6:14, 8:19, and 9:59.

Without the calibration the datalog was made with it's hard to say what might be happening.

here's the calibration

Has it been properly tuned at part throttle?

With the ignition on, but not running, does it read smoothly when moving the throttle?

It was tuned by a professional, so I hope it is properly tuned at part throttle.

Here is a datalog of car not running, the throttle looks a lot smoother than when it was on the track.

It may be the engine mounts being too stiff and the TPS does not like that much vibration.

I have hasport 62a mounts. Not the stiffest but stiffer than OEM. Is this common with k24 builds with type s oil pump? Would a fluidampr harmonic balancer help prevent this?

Also, from the datalogs. Do you think my car is running too rich?

From the calibration, is tip in fuel too high?

You can try the balancer and see if it helps.

It does not appear to be running too rich or have any major tuning issues, but I am not a tuner and cannot spend several hours going over the datalog with a fine-tooth comb.