Chevrolet Impala Limited no start issue due to lack of fuel pressure after new fuel pump injector installation on Chevrolet Impala Limited

Some Chevrolet Impala Limited owners report experiencing no-start issues after installing a new fuel pump and injector, often related to a lack of fuel pressure. These problems can occur if the gas level is maintained below half a tank, which risks overheating the pump. In certain cases, owners find that even with a functioning fuel pump, fuel pressure may still be absent. To diagnose this, it is suggested to remove the fuel line connected to the fuel filter and install a fuel pressure gauge. Additional complications may arise from a faulty replacement pump, a malfunctioning fuel pressure regulator, a clogged fuel filter, or trapped air in the fuel circuit. Proper installation of the fuel pump and injector is critical, as poor installation can lead to starting issues despite having replaced the components. To resolve these concerns, it is essential to check the installation, verify the condition of the replacement parts, and test the fuel pump relay and harness for electrical issues. If problems persist, consulting a mechanic for a thorough diagnosis is recommended.