when does fuel pump operate?

Asked by Amy Jul 03, 2016 at 06:09 PM about the 1980 Dodge D-Series

Question type: Maintenance & Repair

No pressure when i turn on the key but 10 psi when it is running.  Is the pump
supposed to run with the key on not just when cranking?  1989 D150 5.2L

2 Answers
144,725

T_S_T answered 8 years ago

That is low pressure for running,and no the pump want run but a few seconds when you just cut key on,sounds like the pump might be getting weak.

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144,725

T_S_T answered 8 years ago

Ans if you havent change the fuel filter may try it first before replacing pump.

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