I just installed a test pipe on my 99 gsr integra and my check engine light goes on and when i use the comp thing to turn it off it wont go off... my buddy with a 00 si had that same problem with his car and he did something with his ECU to make it turn off but i dont know if it would work for the same with me. Help please???

 

pull the negative off your battery for 10-30sec, then put it back on. start your car and the CEL should go away.

 

Take off the test pipe and your CEL will go off.