So I have a lil problem goin on....I have p28 on a b18 swap I used to have the code vtec solenoid but then I unplugged my ecu and plugged it back in and I had no more codes....and recently it came back on but it turned off by itself...then it turned on and I check for any codes ( I kno how already) but wen I did check for codes I got nothing it didn't blink at all it stayed on so I turned off the car then removed the wire from the place where I put it in and the check engine light didn't turn on I'm not sure if its a good thing or should I worry