So I just got an Acura TL Type-S 2007 and drove it about 1,200 miles. I've had 3 misfire codes, P0301, P0300 and P0305. There wasn't any issues that I noticed and the car sounded normal. I can hit about 4 RPM's before the check engine light blinks for a couple of seconds and then just stays on. It still doesn't affect the performance. I was wondering how should I go on about this? Should I reset the ECU? Do compression test? This is the first time I've encountered this so was just needing some insight. I did order some spark plugs and was just looking on what to do moving forward.

 

I did valve adjustment didn't work ,than did new fuel injectors and that fixed the misfire code for me .

 

Oh hey! Quick update, my ignition coils were fine! I changed out the spark plugs with NGK 6994 and the CEL was gone. The previous spark plugs looked pretty good. I guess a spark plug was just loose, but I still ended up replacing all 6 of them.