The negative effects of unmitigated carbon buildup can include poor fuel efficiency, loss of horsepower, check engine lights, misfires and excessive emissions.

It has a pivoting butterfly valve or throttle plate to control the airflow to the intake manifold and combustion ... We highly recommend cleaning the throttle body every 30,000 miles — more ...

If you find oil in your intake manifold, it's not something that should be ignored, but what has caused it isn't always clear ...

In diesel performance, achieving optimal airflow is the cornerstone to unlocking your engine’s full potential.