300k miles. It drives fine but going up hills it falls on its face, with or without the cruise control. If you are on the interstate left lane doing 80 and start up an incline, you will be doing 55 in the right lane by the time you reach the top top. Engine runs smooth no misfire and professional computer scanner (with up to date software) does not show any codes. Not a Honda dealer scanner though. Professional mechanic with 35 years experience, can’t find the issue, running out of things to check. Compression check good, new coil packs, coil packs changed twice, catalytic converter 1.5 years old, fuel pump and injectors checked good.

 

The third set of coil packs fixed the problem. The first two were made by Duralast (junk). It has been months trying to Identify the problem.

 

Thanks for the update
​​​​​Coils can cause some crazy weird faults.

 

I had one coil pack fail on my '09 Fit around 170,000 miles. It would miss hard on 1 cylinder during acceleration, random miss at idle when hot. Crazy but that wicked misfire never threw any CEL codes. New genuine OEM coils and plugs cleared it right up