eng light

[buellup12]

put a drummer on my 06xb12ss now eng light comes on randomly

 

[LeFox]

emulator for exhaust valve?

 

[mrdozer2you]

Engine light usually means emissions. By changing the pipe you have changed the emissions. You could buy a servo emulator ( mine went bad in under 2k miles...so I do not recommend ) Or leave the servo cable plugged in. Or better yet get a re-map or race ECM.

 

[buellup12]

thanks took it in ,bad o2 sensor