Hello honda tech, I just recently bought a civic with a b16 swap in it and when i turn the key the cel light comes on when the oil pump turns on, once the oil pump is quite again the cel light goes off and stays off until i turn the car off. What is the cause of this?

 

Normal. And you mean fuel pump.

 

Yes fuel pump! >.>
But it didnt happen when i first bought it, what is the cause of it?

 

You probably didn't notice it before. If it comes on for two seconds and goes out it is normal.

 

First time in a car? Most cars do that....

 

First time in a Honda