Honda "Fishbite" MISFIRE (Diag & Repair)

My Dad's 2007 Honda fit has developed a "fishbite" misfire under load at 130k miles.
I replaced the original spark plugs 20k miles ago, so what could be the problem this time?

THINKTOOL PROS:
https://www.amazon.com/dp/B08SWH2KP4?...

Enjoy!
Ivan

• #autos_vehicles
• #honda
• #misfire
• #ignition
• #coil
• #boot
• #spark
• #plug
• #corrosion
• #parts
• #diagnose