Let'* start with easy and free.
You changed out the coils. Did you happen to lift up the ICM, clean both it and the mounting plate (add a light layer of dielectric) before tightening the new coils down?
Give this a try. The ICM to mounting plate is a ground that is critical to the coils and ICM functioning properly. (And I have a little experience here myself
Check fuel pressure and scan for any codes. Most sensors do report back and set codes. You can have a code w/o settting a check engine light.