Hondata

Stop looking at the calibration and look for mechanical causes. Something is either closing the throttle or restricting the intake. In the past I've seen flexible couplings on the intake collapsing which cause this.


I have tried to look at both, no CEL, so no leads.

Restricting the intake ...

Here's a picture of the log to help.

https://c1.staticflickr.com/5/4174/34814783215_b5d984da48_b.jpg

I've been noticing this for months, the car is not a daily so I have been on and off in trying to diagnose.
Also the car is still drivable, just lacks the benefits of the K20 if it's dying at ...