Misfire at 18 and 25 mph

It all started like this:
I got check engine light and vehicle stall.

When checked 1 ignition coil was bad. After replacing that 1 ignition coil. The check engine light went off.

The vehicle was working fine at high speeds and idle but a misfire occurs at 18 and 25 mph.

So changed the whole 4 coil packs and spark plugs. Still the same problem.
Changed the fuel pump. Still the same problem.

The problem went away after closing the EGR valve and running.

So replaced the EGR valve with brand new. But the problem is still there.
Do not know what the issue is.

It was working fine until 1 ignition coil went bad.

The scanner doesn't read any errors either. Until we cruise the vehicle and pick live cylinder misfire counts data on scanner.

It shows 1 and 3 cylinder misfire counts.

FYI ; The 1 coil pack was not Nissan original ignition coil pack. It was a New Era brand coil pack which was much cheap but same code number which fits the vehicle.

Vehicle has no issue after closing the EGR valve. R.

Could this be the issue? Or something else?