O2 sensors

[831hp]

I have removed my O2 sensors and found 1 to be light brown in color, the other to be black soot coverd in color. What would cause this? Possibly a leaking injector or could it be oil leakage from the manifold bolts and leaking into the exhaust stream? or something else? I need some input on this one.

[Z Factor]

Originally Posted by 831hp

I have removed my O2 sensors and found 1 to be light brown in color, the other to be black soot coverd in color. What would cause this? Possibly a leaking injector or could it be oil leakage from the manifold bolts and leaking into the exhaust stream? or something else? I need some input on this one.

Hello, and welcome to the forum.

My guess would be a leaky injector, but hopefully someone else will be along to offer a more definitive opinion.