2005 Sentra 1.8 random misfire

[roman88]

Got a 2005 Sentra 1.8 auto. It started to misfire occasionally. I can drive it for a month OK, then it will misfire for some time, then drive OK.
It displays P300 code, random misfire, although once or twice it also had P302, cyl 2 misfire.
I replaced spark plugs, also swapped coils. Spark looks strong when I crank the engine.
Also got a fuel pressure tester from Autozone, it showed 51 psi pressure, which is normal per Nissan manual.
Replaced injector #2 with a new one. Cranked the engine with injector rail out, the spray looked OK on all 4.
It's still misfiring randomly. Will do that under load or at idle.
I've ran it on the freeway for 10 miles and it runs OK, then will misfire again.
Will misfire at any temp, cold or warmed up.
I tried tugging on wire harnesses for injector and plug, checking for bad connection, that did not make any difference.

Does anyone have ideas on this?

[RED_DET]

Cam or crankshaft position sensor could be a culprit.