The fuel pressure regulator may be small, but it plays a big role. Learn what it does for your engine and how a failing one can affect performance.

An ultra-high-performance engine, whether in a NASCAR, a Pro Stocker, or even a heavy-duty street machine, needs an incredible amount of fuel to do what it's supposed to do at high speeds.

I own a 1991 Corvette that’s developed an unusual problem: It will not start when cold unless I squirt ether starting fluid into the intake manifold, at which point it starts immediately. Once started ...