One of the most important measurements we make while tuning an engine is finding out what the actual balance of air and fuel was inside the engine. It doesn’t matter if we have a carburetor, port ...

Modern vehicles often have multiple oxygen sensors — typically two per cylinder bank — to fine-tune the air-fuel mixture and monitor catalytic converter performance. Upstream sensors adjust engine ...

Your car's exhaust system is one of the most overlooked yet essential components of your vehicle. It does far more than just quiet the engine noise. The exhaust system directs harmful gases away from ...