P0300 Chevrolet - check engine light on and off in high rpm

Question

Every time the car go high rpm especially in 4th gear

Check engin flash on and off rapidly

I check it with computer and seys P0300

Answer 1

P0300 Random mifire

Anytime the CK ENG LT flashes this is iignition related.especially when acclerating , what happens is spark demands from the ingition secondary is greatly needed to meet the demands for accleration , what you have is a secondary ignition seeking ground. a full tune up with a igntion coil  is required.