Why is the fuel injector not in the intake?
If the spider is leaking the fuel has no way of getting into the oil unless he has an intake leak so serious the car wouldn’t be running at all.. The injector is inside the sealed part of the intake. Thats why the fuel pressure regulator piggy backs on the injector without a vacuum line.
What causes the injector to increase effective pressure?
Fuel Pressure Explained. Effective pressure is what injector flow rate is ultimately based off of. When an engine is idling, there is a vacuum in the intake manifold. This vacuum pulls fuel out of the injectors, and increases the effective pressure across the injector to a pressure higher than the rail pressure itself.
How does a return style fuel injector system work?
Return style systems hold a big advantage in that with a vacuum/boost referenced fuel pressure regulator, the system can maintain a CONSTANT effective fuel pressure, which can extend the range of fuel injectors and help them function at lower fuel demands as well.
What are the symptoms of a bad fuel pressure regulator?
The symptoms are very noticeable, too. You may notice a very rough idle, rough acceleration, slow acceleration, and vibrations from the engine. There are also many causes of engine misfires. It can be a problem in the spark plug or the ignition coil.
When do you assume there is enough pressure in the injectors?
If the engine runs, they assume the injectors are getting adequate fuel pressure. If the engine cranks but won’t start, and they depress the service valve on the fuel rail and some fuel squirts out, they assume the injectors have pressure. They do, but the question remains, “How much pressure?”
Return style systems hold a big advantage in that with a vacuum/boost referenced fuel pressure regulator, the system can maintain a CONSTANT effective fuel pressure, which can extend the range of fuel injectors and help them function at lower fuel demands as well.
What’s the fuel pressure of a direct fuel injection system?
Direct fuel injection systems operate at fuel pressures from 500 Psi at idle all the way up to 3000 Psi. Even thou fuel pressures are very high clogged fuel injectors does occur.
The symptoms are very noticeable, too. You may notice a very rough idle, rough acceleration, slow acceleration, and vibrations from the engine. There are also many causes of engine misfires. It can be a problem in the spark plug or the ignition coil.