I have a jdm B18C in my 97 civic sedan. It ran perfect for the last two months, now its blowing black smoke out the exhaust after I adjusted the idle, it started doing it. Also it feels like its missing too. I took out the spark plugs and they had carbon build up on all four of them so I changed them and put new ones in. Still blowing black smoke. Bad fuel pressure regulator? Its the oem for the itr. Any help or info would be appreciated.

 

how old are the injectors,how are the plug wires???

 

Any Cel's

 

It has the injectors the motor came with. The motor has 20k on it. And it is running cels but it wont let me read them.

 

The plug wires are brand new ngk. So I can't figure out what the problem is