What is a common indication of a weak fuel pump?

A weak fuel pump often leads to engine no-start problems because it is unable to deliver the necessary fuel pressure and volume to the engine for proper operation. When the fuel pump is not functioning effectively, the engine may not receive enough fuel to ignite, leading to difficulty starting or failed attempts to start altogether. This symptom is particularly noticeable in cold weather or after the vehicle has been sitting for a while, as the fuel system may struggle to supply the required fuel flow.

Increased vehicle speed, extremely low engine RPM, and higher fuel efficiency do not typically correlate with a weak fuel pump. Increased speed and low RPM might indicate other issues related to engine performance or transmission problems, while higher fuel efficiency would suggest the fuel system is working optimally, which contradicts the symptoms of a weak fuel pump. Thus, the presence of engine no-start problems serves as the direct outcome one would observe when the fuel pump is not performing as intended.