We may receive a commission on purchases made from links. A vacuum leak in a car occurs when there's an unintended opening in ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? As you've heard many times, your car's engine is nothing but a big air pump.

In my 35-plus years of working on cars, I have encountered nearly every frustrating troubleshooting problem in the book. Part of the issue stems from my affinity for old Jeeps and classic cars ...

The pumping of an engine’s pistons creates a vacuum in the cylinders, and that vacuum is filled by air drawn in through the intake system. If leaks develop in hoses or engine parts downstream ...