Hyundai Tucson won't start issue persists after new fuel pump installation on Hyundai Tucson

Some Hyundai Tucson owners report experiencing persistent starting issues even after a new fuel pump installation. These problems may occur if the O-ring from the old pump was not transferred to the new one, resulting in insufficient fuel pressure to start the engine. Additionally, some owners have encountered faulty new pumps due to manufacturing defects, despite being brand new. The failure to replace a clogged fuel filter during the pump change can also hinder fuel flow to the engine, leading to starting difficulties. Other fuel system issues, such as bad fuel injectors or contaminated fuel, can further complicate the situation. Moreover, if the fuel pump relay is not activating, it may prevent voltage from reaching the pump. Lastly, some owners find that installing a complete fuel pump housing and cleaning the fuel tank can help avoid future problems. If starting issues persist, it is advisable to revisit the installation process and check all related components for proper function.