Your car's engine needs a very specific diet of air and fuel to do its job, and it's the fuel pressure regulator's (FPR) job to feed it the right amount. The gadget is relatively tiny and can fit in ...

We don't have to tell you that too little juice to the squirters, especially under boost, is a costly proposition that could lead to serious internal surgery on your engine. Twelve years ago, when ...

Q: I am having an odd problem with my 2001 Saab 9-3. After the car is fueled, it is hard to start. I have to crank the engine, then stop, crank again, stop cranking, et cetera. This problem started ...

Every car lover wants to bolt in a real toad-strangler of a fuel pump. And while the reasons may vary—you want to upgrade your weak stocker, you're planning engine upgrades, you're going racing, you ...

Unlike with carburetors (which use about 7 psi), fuel injection relies on much higher fuel pressure (usually between 38-50 psi). The elevated pressure helps atomize the fuel as it flows through the ...