Thus the term Straight 4 or 6 or 8 depending on the number of cylinders. In a V formation there are 2 banks of pistons angled away from each other, moving up and down. No pumping of the gas pedal is required when starting the car. Subaru uses a sequential multi-port injection system. This means that the fuel is delivered to the proper cylinder in the correct firing sequence and that each cylinder has it's own injector, thus a multi-port system.
Older cars use a carburetor or single port injection fuel delivery system.
If these components detect a problem they will compensate for the problem allowing the car to be driven to a repair shop or safe place. The check-engine light may come on but the car will still run so you're not stuck. The axles that turn the front wheels have a bend in the middle called a knuckle joint. This joint is encased in a rubber boot, packed with grease, called a CV Boot. You can see these if you look down at the back of the engine.