It is important to check everything else before you do a costly and perhaps unnecessary fuel pump replacement. Look for electrical problems, bad wiring, a short, split hoses, a vacuum leak or a clogged fuel filter.

Before you suggest a customer needs to replace the fuel pump or before you purchase a fuel pump yourself, be sure to check the following:

  • Fuel level in the tank;
  • Power at the fuel pump fuse/relay;
  • Faulty vehicle fuel system wiring, such as melted or burnt vehicle wiring and electrical grounding issues;
  • Damaged fuel pump electrical connectors, such as “bubbled” or burnt plastic and discolored terminals (they should be shiny).
  • Damaged fuel line connectors or split or broken fuel lines that are leaking;
  • Vacuum leak or clogged fuel filter.

This simple checklist of common causes of hard/no start symptoms will help determine if it is, in fact, a fuel pump failure.