What are the causes of insufficient fuel pressure?
1 Answers
Insufficient fuel pressure can be caused by: 1. Internal blockage of the high-pressure fuel pump or malfunction of the pressure regulator; 2. The cold start solenoid valve stuck in the normally open position; 3. Damaged fuel injectors, leading to excessive fuel return or large amounts of fuel leaking into the cylinders; 4. Bends, collapses, or blockages in the low-pressure fuel line causing poor fuel supply; 5. Incorrect signals from the pressure sensor; 6. Damage to the electric fuel pump. The effects of insufficient fuel pressure include: 1. Increased likelihood of fuel line blockages or leaks, clogged fuel filters, faulty overflow valves, or excessively low pressure regulation; 2. Reduced fuel supply, which affects idle speed and acceleration.