What faults will occur if the gasoline pump pressure is insufficient?

[VonHayden]

Insufficient fuel pressure will cause the vehicle to accelerate weakly or even shake and stall. At the same time, if the fuel pressure cannot be maintained, it will result in the engine failing to start on the first attempt. The fuel pump requires a power source to operate, and the lower camshaft is driven by the engine crankshaft gear. The main reasons for insufficient gasoline pump pressure are: 1. Reason one: The oil seal at the rear end of the fuel pump drive gear shaft is worn or the pipeline joint is not tight, allowing air to enter the pipeline; the fuel tank is low on fuel, and the filter is dirty. 2. Reason two: The end face bearing of the fuel pump gear is worn or stuck, causing excessive axial clearance in the fuel pump gear. 3. Reason three: The needle bearing is damaged, causing abnormal meshing of the fuel pump gear, and the inner cavity of the fuel pump housing is scratched.