fouled plugs

[turbo buicks]

can fouled plugs cause high BLMs?

[HairDrier]

High BLMs means you are lean, and fouled plugs would make the car run rich due to incomplete combustion. You probably have an air leak somewhere

[1badTTA]

High BLMs means you are lean, and fouled plugs would make the car run rich due to incomplete combustion. You probably have an air leak somewhere
There is some truth to that but it can be somewhat misleading. If you have high BLM's it means the ECM is adding fuel but if you have a bad O2 or other problems then the ECM could be adding fuel that isn't needed causing fouled plugs. HTH
:joint: