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Thumping sound after new fuel pump install

Discussion in 'Grand Cherokee' started by 2000Laredo, Sep 15, 2021.

  1. Sep 15, 2021 at 1:26 PM
    #1
    2000Laredo

    #1
    2000Laredo [OP] Member

    Joined:
    Jul 12, 2021
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    Male
    First Name:
    Ronnie
    Vehicle:
    2000 Grand Cherokee Laredo
    2Inch lift sitting on 275 75r Mickey Thompson Deegon 38s.
    Put a new fuel pump in.2000 grand cherokee laredo straight 6.and now hear a humming sound.didnt hear before install.
     
    2000Laredo, Sep 15, 2021
    #1
  2. Sep 16, 2021 at 9:22 AM
    #2
    Awrench

    #2
    Awrench Well-Known Member

    Joined:
    May 12, 2018
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    3 jeeps
    Some thoughts-

    Brand of replacement pump.
    If applicable external fuel filter/regulator.
     
    Awrench, Sep 16, 2021
    #2
  3. Sep 16, 2021 at 12:05 PM
    #3
    2000Laredo

    #3
    2000Laredo [OP] Member

    Joined:
    Jul 12, 2021
    Member:
    #5791
    Messages:
    20
    Gender:
    Male
    First Name:
    Ronnie
    Vehicle:
    2000 Grand Cherokee Laredo
    2Inch lift sitting on 275 75r Mickey Thompson Deegon 38s.
    I will look into that and get back to you.one more thing.only getting 8.5 miles per gallon.any thoughts.
     
    2000Laredo, Sep 16, 2021
    #3
  4. Sep 16, 2021 at 1:32 PM
    #4
    aggrex

    #4
    aggrex Well-Known Member

    Joined:
    Sep 12, 2016
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    #203
    Messages:
    4,912
    DE
    Vehicle:
    Backcountry '16
    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Unless the gas is leaking somewhere the mpg drop is probably due to a different issue.
     
    aggrex, Sep 16, 2021
    #4
    Groundfault likes this.
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