Questions & Answers for: automotivehelper.com low voltage on fuel pump

...low voltage at the pump can contribute to low fuel pressure. All three must be check before replacing the pumpIf the fuel pressure is good, then we check for spark down at the spark plugs while ...

...voltage should be between 13.5- 14.5 volts. A fully charged battery is 12.5- 12.75.If it is below 13.5 while at idle alt. is not charging check connections and belt